SIRIUS satellite radio for 2003-up General Motors vehicles

Item #: 607SIRGM1

48 Reviews

This item is no longer available.

Original Price: $99.99

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If the factory stereo in your 2003-up General Motors vehicle is satellite radio-ready, you now have the option of adding a SIRIUS radio.

This package includes everything that's necessary for you to play SIRIUS through your compatible factory stereo: a SIRIUS radio, a roof-mount antenna, and the adapter cable that connects the radio to your stereo.

You can mount the compact radio easily in a convenient spot behind the dash. The adapter cable hooks up to the radio at one end, and to your factory stereo at the other, providing all signal and power connections. The magnetic antenna mounts firmly on your vehicle's roof, and connects to the satellite radio. An extra connection lets you keep a factory (or factory-compatible) CD changer connected to the system.

Note: Your in-dash stereo must be have the factory satellite radio option to work with this SIRIUS package. Please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to check compatibility. If you're not sure whether or not your factory stereo is satellite radio-ready, ask your local dealership. A SIRIUS subscription is also required.

Product Highlights:

  • SIRIUS adapter package includes SIRIUS radio, factory-system adapter cable and box, and roof-mount antenna
  • works with compatible, satellite radio-ready GM factory stereos
  • audio cables included
  • warranty: 1 year
  • Our 60-day money-back guarantee


Average Customer Review:

48 reviews
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Install in 2003 Suburban

Written By lbdaggett, Long Beach, CA on Wednesday, August 03, 2011

Crutchfield Customer Review (What's this?)

As petroboy43 noted, please read all the reviews. The hardest part of install of the unit behind the dash. My vehicle was not an original XM vehicle, and mounting behind the glove box is impossible with the supplied T-Wires. I was able to place it in the dash below the center venting duct and behind the storage cubby directly below. That alone took a bit more than an hour. The rest was simple. Tapped into 12V power supply in center console, which is very easy to access. Being a suburban, I needed every inch of the antennae wire. Mounted it on rear of roof, and ran wire behind third break light and used existing grommet to run wire into headliner. Plastic trim pieces come apart easy. Fired up first time, activated no problem. Only complaint is that the antennae does not work as well as my other newer vehicle's factory sirius set up.


Written By George B, Warrior,Al. on Thursday, January 27, 2011

Crutchfield Customer Review (What's this?)

This item wasn't available from the dealer, however I purchased it from Crutchfield and it
works perfectly. It plugs into the factory harness easily and comews through the display
like a factory unit. Great!

2005 Rendezvous with Factory Stereo

Written By Dayve, Bedford, Ohio on Tuesday, February 03, 2009

This was an easy install and took about an hour to complete. I knew in advance about the short t-cable and took that into account before I started. The antenna was mounted on the rear and run down the passenger side to be hidden in the sill trim and the unit itself was placed just below the center console airducts and tie wrapped securely to the passenger side console. The power and ground I picked up in the lower driver's footwell when I tapped into the cigarette lighter. The unit fired right up and displayed correctly on the display. I was able to retain the steeringwheel controls which was useful because of the safety feature and my wife now has Sirius again.( I'm still her Hero!)I suggest that you look at the length of the cable and determine where you're going to put the unit before you start, saves loads of time. Service was great as always with Crutchfield even though they were out of stock after I ordered and let me know right away. This is definitely the best and cheapest way to gain factory Sirius in your GM vehicle.

2003 GMC Sierra ext cab

Written By hurst7t9, Scranton, PA on Saturday, December 13, 2008

The biggest help was the other reviews on this board. Installation of the antenna and SIRGM1 took about 3 hours. Antenna mounted on roof and wired through third brake light, across headliner to the pass rear pillar, down pillar under edge of carpet and up beind glove box. Since I had the resources and I knew about the T harness being too short, I made the T harness about 12 inches longer. Perfect length. Mounted the SIRGM1 using three of the supplied screws to the firewall, just above a wire that is routed on the firewall. Removed radio, routed wiring harness behind the dash to the radio. Plugged blue connector into radio, plugged in antenna and main radio harness. Tapped into cigarette lighter power and ground for SIRGM1 power and ground. T harness plug was very difficult to plug in and took about 1.5 hours to make T harness longer. If it wasn't for those two things I would have given it 5 out of 5 stars. Works perfectly, like it was always there.

Worth the price and effort for Factory look

Written By Vinchenzo, NJ on Monday, March 31, 2008


1) Price is reasonable
2) sound is better than i expected. i dont have bose radio, and i was never happy with over the air sound quality for fm. this unit is just as good if not a bit better. I would say the quality is better than a plug and play unit.
3) Can't beat the factory look
4) Functions well with factory radio (head unit)


1) installation in not simple
a) directions that came with unit were not great
aa) they did not suggest or even adress a mounting location
bb) they do not tell you you need to go through a series of steps to reset the radio so it can recognize the new tuner
cc) they dont mention that with the t harness unless you have another accesory, you will not need to use all three connectors
b) the t- harness that comes with the unit (this is the one you will use if your vehicle did not come with xm from the factory) is too short.
c) tech help, was not great. I have used them for previous installs any they were great. this time, i spoke with three different techs and received conflicting information. (one insisted that i needed to use all the inputs on the t harness, even though i was not using any accesories. another failed to mention i needed to rest the radio

overall good value and worth the effort

SIR-GM1 06 Sierra 2500 bose/6chngr/xm

Written By Dan, Phx, Az on Tuesday, March 25, 2008

Crutchfield Customer Review (What's this?)

Installation wasn't slightly difficult. Used the knowledge from other reviews. Bracket for the XM module had the screws threaded from the reverse side. Very difficult to get them undone in the small space. I reversed the screws in the bracket once assembled to ease the reinstallation of the bracket with sirius unit ziptied to it. ------------------------------------------
As fo the function of the unit, there is a noticeable blank screen until the unit connects. Not sure of the reason, but it has a 3-4 second pause before the factory radio displays anything. This only happens when the sir unit was the last active when powered off then on.
Overall the unit performs very well. No signal strength issues.

Service Great...Reception poor on Corvette

Written By Daniel, West Palm Beach FL on Sunday, February 03, 2008

Crutchfield Customer Review (What's this?)

I switched out the factory XM receiver for the SIR-GM1. The installation was as easy as could be. The reception, however leaves much to be desired. I gathered from other audio websites that the issue is the fact that the Corvette is not a metal-bodied car. The car acts as part of the antenna.

I do love Sirius service, but I will continue to work at getting better recpetion so the music does not cut out. I had the service in my Mustang, and the reception was much better. I used the SIR-KEN1 for that installation.

Overall I would do it again, as the talk stations are not that bad, but the music does suffer from dropouts.

I gave this a 4 star rating because the equipment works as advertised, but the car makes reception difficult.


Written By jvnova67, central Mass on Sunday, January 06, 2008

Crutchfield Customer Review (What's this?)

The t-harness definately isn't long enough.Installation was a little more challenging than I thought!There were two connections on my stock 2003 Chevy Silverado radio.One of which I disconnected upon radio removal and the other was empty.The empty one is for the bus-2 communication.After careful reading of the installation literature, it would appear as though a factory connection from the vehicle side needs to be plugged into the t-harness.Apparently this is not needed on my application.Some clarification through tech-support pointed me in the right direction.I feel the installation instructions could have been more specific.

OK for the money

Written By Jim, Bel Air, MD on Thursday, November 29, 2007

Crutchfield Customer Review (What's this?)

As many others have said, the T harness just isn't long enough. Stock satellite tuner location is behind the glove box in my Olds Alero. T Harness is about 3 inches too short to mount there. It's rigged up behind the climate controls with some zip ties and double back sticky tape. Other than that, the installation was easy with most of the time routing the antenna wire under trim. Power was supplied through the auxillary power point next to the glove box.

I would only rate the signal as so-so. I'll loose signal for a good 5 or 6 seconds if I drive by some tall trees. The stock Sirius in my Jeep Grand Cherokee has never lost signal as long as I was moving.

Good alternative to plug and play systems if you live in an area without bridges, or trees, or hills.

2004 Impala

Written By Intrepid1, Baltimore, Md. on Thursday, October 11, 2007

Install behind the dash is impossible. After removing radio and connecting the T-Harness, I let it through a hole to the right of the Radio and down to the back of the cubby hole that sits beneath the climate controls. The supplied power harness is not long enough to reach the battery through the firewall so I got a hot connection in the passenger fuse box. The Sir-GM1 is strapped behind the cubby hole out of sight and activated. I gave it 4 stars and not 5 because the T-Harness lenght is too short to place the tuner under the seat. My antennae that has a 21ft. cable is too short to reach the the back roof from its present location, but would reach if could install tuner under seat. The tuner works great otherwise. Looking for a longer T-Harness, COME ON Sirius!

2006 Avalanche-XM installed

Written By George, Arizona on Wednesday, September 19, 2007

Crutchfield Customer Review (What's this?)

It is in. It works beautifully. I am between 5 minutes and 4 hours to innstall. Read all of the reviews prior to installing. In my Avalanche you do not need to remove any glove box/cladding screws. Just open the glove box and on the right side there is a retaining detent built into the box. Just ease carefully the right side of the box to the left enough to clear the obstruction and the xm receiver is in front of you. The glove box hangs from the hinge. Getting the xm receiver out is not intuitive. There are two nuts to remove and two metal band retainers that snap over the top of the receiver. Bend those up and out of the way. The yellow antenna plug must be pushed in to release it. The blue retainer must be out of the plug and the plug has a detent to press to get the plug out. Silicone around the chopped off yellow xm antenna plug protector is genius. I used two large wire ties which I wrapped around the existing mount and the receiver. Great product and it arrived 1 day early. Very satisfied.

Installation and Review for Silverado owners

Written By Richard, Shelton, CT on Sunday, September 16, 2007

I installed this unit into my 2004 Chevy Silverado 1500 WT. I already had a CD/MP3 player installed, but no factory XM. I ran the antenna wires through my brake light into the back of my cab.

Using Crutchfield's mastersheets, I was able to run the antenna wire behind the rear speaker paneling, and under my flooring. The WT Silverado model has Vinyl flooring. It can be easily lifted up so you can fish the antenna through to the dash.

Then came the big problem of where to mount the tuner box. The manual says to mount it behind the glove box (in the stock XM location). This is impossible if your truck isn't pre-equipped with XM. Therefore, I had to squeeze the unit in directly behind my passenger side air bag controls, between the metal frame and the hard plastic dash molding.

The controls pop out very simply. Moving the tuner however, takes a bit of patience. You might need a friend assist you with it. Afterwards, I spliced into my 12V DC outlet for power (needs constant 12V), activated online, and I was all set. You may want to remove the AC controls to get more clearance for wiring into the power supply.

Sirius should honestly consider making their "T-harness" longer, or offer an extension for it. But I suppose they are too busy getting new units out for the '07 and '08 year models.

The service is fantastic, and Crutchfield is #1 in my book. Got the order in about 24 hours. If the install was easier, I'd give it a full five stars.

SIRIUS SIR-GM1 in 2004 Trailblazer

Written By Charles, Omaha NE on Saturday, September 15, 2007

Crutchfield Customer Review (What's this?)

The installation was fairly easy. It took me about an hour and most of the time was spent trying to disconnect one instrument panel switch. It wasn't a problem with the SR1 unit. Once everything was in place it took about 2 minutes to get the radio registered. It works great. I have the SR1 and SR2 band on the factory radio and all the controls work as they did before the installation. I also installed a different Sirius receiver in my wife's car. She can see the artist and song. I only see the satellite channel number and name; I don't see any artist/song information. Not a big deal as everythign else is great. I'd buy it again.

NG for 2003 Olds Silhouette w/DVD

Written By Robert, Woodbridge, VA on Monday, July 30, 2007

Crutchfield Customer Review (What's this?)

As noted by a 2004 Chevy Venture owner, this unit was found not to be compatible with my 2003 Oldsmobile Silhouette, equipped with DVD player. Yes, my radio had the 'band' button - as required. In addition to the unit, I bought a professional installation card and took it to their shop. They spent a couple of hours pulling the dashboard apart - with care. The interior of an Olds is different than a Chevy of course - and the dash removal instructions that were available/supplied were for a Chevy. Then they spent a couple more hours trying to make the unit work. No good. Crutchfield Fed Ex'ed out another brand new unit the next day. Same story - no good. Everybody involved in this gave it their best effort, but fundamentally the unit was just not compatible with my particular radio. I got a full refund on both the unit and the installation card from Crutchfield. So that speaks well of them. It obviously works with other vehicles, so I can't really rate the number of stars properly regarding it's performance.

Sirius in 2007 c6 corvette

Written By mike, Southern Ca. on Monday, May 28, 2007

Crutchfield Customer Review (What's this?)

Ordered the SIR-GM1 form Crutchfield for my 2007 coupe A6 3lt with Bose/nav. Installed today . How much easier can it get? Took about 5 min. to install (used the XM antenna) 2 min to register. Works great.

Must have if you own a GM vehicle

Written By Robert, Las Vegas, NV on Thursday, May 17, 2007

If you own a GM vehicle and already have or prefer Sirius then you **MUST** purchase this item.

Installation in a 2005 Grand Prix took about 30 - 45 minutes with most of the time spent hiding the antenna & power connectors.

As the Crutchfield site indicates - the SIR-GM1 needs a constant 12v source - a switched 12v will not work, because the radio will loose the presets when power is lost.

The only thing that keeps the SIR-GM1 from getting a 5 star rating is the barely acceptable 18 inch connector to the factory radio. I was able to mount the SIR-GM1 to the back of the climate control unit, but otherwise I would have been out of luck!

As other people have noted - the factory radio indicates SR1 & SR2 when the Sirius is selected.


Written By Joe, Frisco, TX on Thursday, March 22, 2007

Crutchfield Customer Review (What's this?)

in installed this in an 05 Equinox and it was a breeze. Location was behind driver side quarter panel and it took about 20 minutes from beginning to end. I would highly reccomend to anyone wanting to switch from boring XM to Sirius....BaBaBooey to you all

Don't believe all the hype

Written By Brad, Pittsburgh, PA on Tuesday, March 20, 2007

Crutchfield Customer Review (What's this?)

This receiver is great. I installed in a 2003 Escalade with the Touchscreen NAV. The hardest part was getting the wiring out of the XM box. Don't believe the hype about not being able to use the stock XM antenna in the vehicle. Hook it all up enjoy stock like sirius in your Escalade. Enjoy!

Piece of Cake

Written By Matt, Cleveland, OH on Tuesday, March 20, 2007

Crutchfield Customer Review (What's this?)

I installed this in an'05 Pontiac Bonneville GXP that I recently bought. The install was a breeze. The factory XM unit was in the trunk mounted close to the drivers side rear quarter panel. Removing it was actually the longest step of the process.

I used zip ties to secure the SIRIUS unit to the mounting bracket, and removed the yellow clip from the connector for the XM antenna and used that. The whole job took about a half hour, and it sounds great. Channel names show up on the display, as does SR1 and SR2 when switching bands.

Highly recommended.


Written By William, San Diego, CA on Saturday, February 24, 2007

Crutchfield Customer Review (What's this?)

This unit is exactly as advertised and works fantastic. Read all the reviews in this section BEFORE you install. Thanks to all who posted your lessons learned. Remove the glove box as discussed in prior reivews. (7x7mm screws) You do not have to remove the mounting bracket, just slide the old unit down after removing the secruing nuts. After it has been moved down, remove the harness per previously discussed reviews. (Pull up the blue tab then gently pull harness out) I used the existing XM antenna. Just use a pair of end cutters to modify the yellow harness. The new unit is a little to thick to fit properly in the old bracket so use zip ties and a couple pieces of double sticky tape to gaurd against rattles. When using the existing XM antenna, use a little silicone in the jack and zip tie/tape the existing wire harness (modified per above discussion) in place. 1 hour job. Good Luck!


Written By LEIF, WI on Saturday, February 10, 2007

Crutchfield Customer Review (What's this?)

I purchased the SIR-GM1 for my 04 GM Sierra (The truck came from the factory with XM Radio). Siruis's directions are generic and not very helpful. (They cover 40 different GM autos and 3 different radio types, thus 120 combos are covered in only 6 pages). CUSTOMER COMMENTS POSTED HERE WERE THE MOST HELP. It took me an hour or two to install. Next time I could do it in 30 min.

If time is valuable, if you are not mechanically inclined or if you don't enjoy tinkering, pay the $40-50 and have a pro install the SIR-GM1.

Love it! Easy install in Grand Am.

Written By Jeffrey, Rochester, NY on Tuesday, February 06, 2007

Crutchfield Customer Review (What's this?)

This is the best Sirius radio of the 3 that I have owned. It is so nice to just use the factory radio to control everything. My wife's 2004 Pontiac Grand Am didn't come with XM and she was tired of removing the PnP from the windshield every time she parked the car. This unit plugs into the rear of the factory Monsoon system and nobody can tell we have it (except for the antenna on the roof). I mounted it behind the center console so that it is out of sight, yet it is plenty close enough to reach the back of the radio. I tapped into the lighter circuit (also near the Sirius tuner) for the power wire, and ran a new ground to the metal dash support. Very simple. The best part about this tuner......My wife loves it! "No more gadgets to mess with!" Her being happy makes it worth its weight in gold.


Written By kyochum, Lindale, TX on Saturday, January 20, 2007

I am somewhat mechanically challenged so removing the glove box was a little difficult as I did not want to break the molding. Once I had it removed, the XM receiver and bracket were a little challenging to remove in my 2006 Silverado as the 7mm screws that hold it in place are difficult to access. The blue tab that holds the wiring harness has to be pulled outward from the connection but not completely removed to disconnect the factory harness from the XM receiver. Once the XM receiver is removed, the Sirius receiver fits like a glove with some tie wraps to hold it in place. Entire project took about 2 hours or so but might be easier for someone that isn't apprehensive in removing and reinstalling all of the pieces. All in all, perfect application!

no brainer

Written By len, Wisconsin on Friday, January 19, 2007

Crutchfield Customer Review (What's this?)

If you are tired of XM radio, this product is the only way to go. 2006 Chev Silverado conversion took all of 15 mins. Working the Xm unit out of the bracket was the hardest step to do. working through sirius's website to get service took longer than the install. works exactly as the XM service did. Thanks to Cody at Crutchfield for the help removing the radio wire connector, just pull out the blue clip and press. Awesome unit 100% satisfied!! Thanks Crutchfield and Sirius!!

Pretty easy install in a 2005 Tahoe

Written By Dan, Los Angeles, CA on Wednesday, December 27, 2006

Crutchfield Customer Review (What's this?)

The most difficult part of the installation was actually removing the factory wiring from the XM box.
There is a little blue 'plug' that must be pulled out from the connection before the harness can be removed from the factory XM box. Without removing this blue 'plug, you cannot press the tab that locks the harness in.
The antenna connection has changed slightly since the picture was taken by the Crutchfield staff, it only has a single wire now, not 2. This plug is difficult to remove as well, but even if the yellow plastic part breaks, its' OK because you need to remove this part in order to connect the antenna wire to the Sirius box.

Removal of the old XM unit is straight forward but requires some carefull twisting and pulling after removing the two 10mm nuts that hold it into the mounting bracket. I placed the Sirius box in the same bracket and used big zip ties to hold it in place.

Overall, it took less than 20 minutes to do once I figured out that the blue piece was holding the catch on the plug.

Crutchfield was very helpful on the phone too, but you already knew that or you wouldn't be here.

Does not work with 2004 Chevy Venture with factory DVD/RSA

Written By mobrien2, Long Island, NY on Saturday, December 09, 2006

According to DEI (the manufacturer), it is supposed to work with my 2004 Venture with factory DVD. After 2 hrs. of installation work, I found out it is not compatible (even though my radio has a band button). Crutchfield gave me no hassle returning it for credit. I even called GM to find out if my radio is compatible, and they were clueless. If your vehicle has a factory DVD, think twice before purchasing.

Chev. Silverado SIR GM1 installation

Written By jim, Bend, OR on Thursday, November 23, 2006

Crutchfield Customer Review (What's this?)

I ordered the SIR GM1 tuner to replace the XM tuner in my 2006 Silverado. It seemed like a simple installation job, but not so. Tried it, then paid an installer to do it.
The XM tuner is behind the glove box, itself requiring a call to Chev. dealer to remove without breaking. (Remove all 7 mm screws and then pull hard on corners - has holding brackets.) 2nd problem - how do antenna and wiring harness pull out of the XM tuner? They are locked and hard to reach. Ant. has a a thingy to push and harness a blue thingee to pull up. Then, remove two screws holding tuner to bracket and drop XM tuner DOWN, bending the bracket a little. Then you need a cord adapter to attach XM ant. to Sirius tuner. Install SIR GM1 and put back together. Works great when I got it all back in, using the factory XM ant. Sirius comes up fine on the display.

2003 Avalanche

Written By petroboy43, Skagway, Alaska on Friday, November 10, 2006

Great experience all around. Would agree with other reviews about finding the right mounting location. Wish I had read "Randy's review from Gilroy CA first. The best place for the unit IS directly behind the center dash duct and stash pocket below. There is a main beam support you have access to once they are removed. Start by taking off the dash face, remove the radio and climate controls, Radio Harness is short but manageable. Drop the glove box down so it's out of your way and remove the 2 air duct covers between the radio and glove box. All the plastic snaps out so exercise a little caution. You now have a clear view of everything. Knowing that now will save you an hour or 2 of fooling around! Great product and support! Well worth the effort.

It works in a C6 just fine!

Written By Mark, South Carolina on Saturday, November 04, 2006

Crutchfield Customer Review (What's this?)

The product description says "This item does not work with the factory system in your car." for a C6 Corvette, but it does just fine in my 2007. I even used the already hidden XM antenna with the new SIRIUS unit.

Installation takes 15 minutes tops to pull the carpet from above the drivers side rear wheel, pull out the XM box and the plastic snap in mounting tray, unplug radio harness and antennas from XM, remove plastic cover off of the YELLOW XM antenna lead, plug in radio harness adapter to SIR-GM1, then plug in stock harness and the formerly yellow antenna lead. Zip tie the new box to the plastic XM mounting tray (to keep it from vibrating since the new unit is a tad smaller) and snap it back in place. Enjoy SIRIUS!

The radio will still display XM1 or XM2 (depending which presets you have selected) since that's part of the radios programming, but you'll be listening to SIRIUS. I recommend 15 and 23 ;-)

Location- Location- Location

Written By Randy, Gilroy, CA on Wednesday, October 18, 2006

Crutchfield Customer Review (What's this?)

That was the hardest part of the installation, finding a location for the unit. On my 2003 Chevy Tahoe I placed it between the center a/c duct and the compartment below it. It's a snug fit, but that is good! Limited on location, due to length of supplied harness for vehicles without XM. If vehicle was originally sold with XM it would be easier to install.
Being able to control Sirius through factory radio is worth the time spent! And, you don't have to search for a clear FM channel!!
Very pleased with Crutchfield, Sirius and SIR-GM1

Over the Top!

Written By Ethan, Baltimore, MD on Friday, October 13, 2006

Crutchfield Customer Review (What's this?)

Once again a great experience from Crutchfield. Ordered this unit at 4:55pm and had it by noon the next day.

Took about 20 minutes to install. Most of that was spent trying to get the xm unit removed from the car and unplugged from the harness. I have a 2004 GMC Yukon Denali.

Plugged in the harness, Removed the cover from the tip of the existing antenna and away I went. Was able to stick it back in the existing clip by breaking off the screw mounts on the unit with some pliers.

This is the bomb! When I turned it on my radio changed from XM1 and XM2 from SR1 and SR2.


Written By Bill, Yazoo City, Ms. on Monday, September 18, 2006

Crutchfield Customer Review (What's this?)

Installation instructions were accurate and easy to follow. The only problem with installation is the close quarters you have to work in. Once installed, the unit works great,I highly recommend it to anyone wanting to convert from XM to Sirius.

Great purchase for a SIRIUS fan

Written By Mike S., Broadlands, VA on Monday, September 11, 2006

Finding the XM receiver and a good place to mount the SIRIUS receiver was not easy but well worth the effort. Great sound and no receiver stuck to my windshield. I used the XM antenna but also had poor reception and switched to the included antenna. Great purchase if you have a GM vehicle and prefer SIRIUS to XM.


Written By Mike, Uniontown, OH on Sunday, September 03, 2006

Crutchfield Customer Review (What's this?)

Installed very easily on my 2005 Grand Prix. Once I figured out where the factory XM box was... behind the driver side rear wheel in the trunk. I used the factory XM antenna for a while, but it dropped the signal too much, so I took the Sirius one and put it behind the back seat near the speakers. It works a ton better. Everything is seamless, the names of the stations are abbreviated to fit on the front of the radio (i.e. Howrd100) which is nice. You can even browse by category by pushing the program type button. Overall a nice piece of hardware. Thanks.

Get rid of XM

Written By Rob, Des Moines, IA on Sunday, August 27, 2006

Crutchfield Customer Review (What's this?)

I installed this product in less than 1/2 hour using the supplied instructions, a box-end wrench, pliers and a couple of wire ties. I removed the XM nox from behind the glove box, used the same bracket (with a couple of minor modifications)and wired tied the Sirius module into the bracket. Snug as a bug.

I did use the Sirius antenna and had no problems whatsoever.

Sirius still has commercial free music. XM has commercials and NO NFL, NO HOWARD STERN.

I have a 2005 Avalanche with navigation system. Song titles and artists appear on the screen and stations can be easily programmed. This is the best upgrade I have bought.

Simple Install, Awesome Results!

Written By Cory, Wichita, KS on Tuesday, August 22, 2006

Crutchfield Customer Review (What's this?)

The Sirius SIR-GM1 works as wonderful as I expected. It was a very easy install with the most difficult part being the dash removal to get to the factory radio.

I installed the tuner unit behind the glove compartment using the supplied T-Harness Interface Cable. I wired the power supply by splicing into the cigarette lighter positive wiring and attached the ground wire to the metal frame behind the factory radio. The Satellite antenna was mounted on the roof by the rear hatch. The antenna wire was run under the door strike plates with more than a foot of extra wire left at the tuner. I have an EXT (the extended version) and there was plenty of wire supplied.

The quality of sound that is brought through the factory system is phenomenal. My wife enjoys her commute around town to the sounds of jazz and I enjoy the NFL station.

If your vehicle is approved for this addition, this is a "Must Buy"!

Crutchfield as usual has excellent products and good advice.

Vibe and Equinox Owners May Want to Wait

Written By David, Rogers, AR on Saturday, August 19, 2006

Crutchfield Customer Review (What's this?)

According to the packaging, this unit is compatible with the 2003+ Pontiac Vibe with the BAND button, and the Chevy Equinox. I have first hand experience with my 2005 Vibe but have read of identical issues with other Vibes, as well as the Equinox:

UNIT 1: Plugged into factory harness in cargo area. Powered up, but never recognized by the vehicles factory radio. Called Crutchfield and was advised to use "T-harness" behind the radio. No luck. Arranged for exchange.

UNIT 2: Powered up, showed the Sirius preview channel on the vehicles factory radio for about 10 to 15 seconds, then switched over to FM1 and would not allow selection of Sirius with the BAND button. Can only get this process to repeat itself by disconnecting the battery for at least an hour. Called Crutchfield and was advised to call the manufacturer (Directed Electronics); no luck getting information from them. Called Crutchfield back and got lots of tips to try, including trying the "T-harness" again. Now I have NO recognition of the unit, even if I go back to using the factory harness. Gave up and sent this one back to Crutchfield for a refund

Sure Im disappointed, but Id give Crutchfields tech support FIVE STARS, even though they couldnt solve the issue. Hey, at least theyre trying...and I tend to think that Directed Electronics needs to delve a bit more into specific vehicle applications. There may simply be a step that was omitted in getting the box to be recognized by cars that do not have a true GM Class II data bus.

Im hopeful that either Crutchfield or Directed will have the issue figured out in few months, at which point Ill try this product again.

2004 Escalade Install EASY

Written By James, Columbus, OH on Wednesday, August 09, 2006

Crutchfield Customer Review (What's this?)

This was a five minute install in my 2004 Escalade. Swap out XM unit behind the glove compartment and use the existing antenna and you're up and running in literally five to ten minutes. There is no need to install the Sirius antenna, simply remove the pastic housing around the exisitng satellite antenna and it plugs right in to the new Sirius tuner. If you don't want to remove the XM tuner, you don't have to take it out. There is enough room to slide the Sirius unit in right next to the XM unit. Simply unplug the XM unit and plug in the new Sirius box. I left my XM unit mounted so when I sell the vehicle I can unplug my sirius unit and take it with me. Again, the existing antenna works great, no need to add the Sirius antenna. Also, all information displays on my head unit fine. Works just like the XM unit, except it is Sirius. By the way, Sirius offers a far superior service.

great purchase

Written By Mannvel, CT on Thursday, August 03, 2006

Crutchfield Customer Review (What's this?)

Ok I bought this unit to be used with my 2005 trailblazer...the installation instructions were a little confusing since it directed me to go behind the glove box. I can see the old XM tuner but no way to remove it..the way to remove it is be loosening 2 screes right under the glove box the plastic cover drops and the xm tuner is attached to that plastic. once that was done it was a very easy process to replace the tuners. all the cables included were correct and easy to install. Very happy with the purchase and the new sirius works like a charm with my radio..presets, info everything works great.


Written By James, Harrisburg, PA on Thursday, August 03, 2006

Crutchfield Customer Review (What's this?)

I have a 2006 Hummer H3. I dislike XM Radio but that is what came with th truck. After listening to Sirius for over a year I really wanted it back. After installing this item into the truck, I couldn't be happier. The sound quality, and being able to hide it is pure joy.

If you are thinking about this item, it is key to your vehicle. Instead of having the unit installed in the way or out in the open, this hides behind the dash or under the seat. Great item!!

2004 Grand Prix without factory XM

Written By Jon, Gaithersburg, MD on Sunday, July 30, 2006

Crutchfield Customer Review (What's this?)

I installed this in a 2004 Grand Prix that did not have factory XM. Electronically, this unit works great. It plugs and plays easily and interfaces with the factory head unit perfectly. My problems are with installing this unit. The interface cable that is supplied is only about 8" long. So, the unit needs to be close to the head unit. This limits the places that I can install it. I'd love to hide it under a seat, or under the glove box, or at least hidden under the console. but I'm stuck with showing it behind the head unit - not an ideal spot for it. I would give this product 5 stars based on performance, but I have to penalize it 2 stars for the cord-length shortcoming. If you're installing this in a car that already has XM, it shouldn't be a problem since you'll already have wiring to a remote location for the factory XM module. And this is not a fatal flaw. Despite the problems I'd certainly make this purchase again. I just wish there was an available extension for the interface cable.

Tricky Install in 2005 Impala - suggestions for product improvement

Written By Michael, Quincy, IL on Saturday, July 29, 2006

Crutchfield Customer Review (What's this?)

Installation in a 2005 Impala to a factory AM/FM/CD unit is tedious, problems result of short cable lengths and mounting location.

Removing the dashboard is a chore, Crutchfield instructions helped greatly.

Hooking the T-harness to the headunit was easy. But then the fun started. This cable is too short to allow for much flexibility mounting the SIR-GM1.

There is a space under the factory radio where one could put the unit given limited T-harness length. Concern about having to tear off the dash to replace the antenna later (and given antenna cable length) prompted a different location.

At the front of the center floor console is an opening where I store CDs. Top of this area behind the dash is where tuner unit is placed -- 1" foam tape secures it directly below the climate controls. Antenna connection can be reached without full dash removal.

Serious wiggling of the headunit and cables is needed to position the T-harness to not block full reinsertion of the radio into the dash.

Old Visor install had antenna above rear window routed behind headliner moulding to above the rear-view mirror. But with this install it was 2 feet short. Antenna supplied also would not reach tuner, prompting antenna install above the windshield.

Power and antenna cables pass under the drop-down panel under the glovebox; access to the inline fuse is easy. Make sure you connect to BATTERY, not a switched circuit to retain presets.


1) make T-harness cable longer (by 18") or include an extender cable for mounting flexibility.
2) a 25 foot antenna cable length.

Overall operation and performance very good.

Finally Sirius for Factory GM vehicles

Written By Michael, Atlanta, GA on Saturday, July 29, 2006

Crutchfield Customer Review (What's this?)

I bought this for my new 2006 Grand Prix with Factory XM. I already have Sirius in my old vehicle and was weary of XM's playlist but figured I would give it a shot. My car has the combo XM and Onstar antenna and my XM signal was horrible. If I went under a tree branch, the signal was gone, so FINALLY Directed released this beauty. The install was super simple, remove the factory XM box, plug in the adapter and run the new antenna. It took me all of 30 minutes to get up and listening to Sirius.

There is a small glitch in the feed to the factory radio where sometimes the full channel will not show in the display, but for better signal and better music, I'll take it any day.

2004 Avalanche

Written By MQF1, Phoenix, AZ on Thursday, July 27, 2006

Crutchfield Customer Review (What's this?)

I installed the SIR-GM1 on an 04 Avalanche with the Bose System and factory XM, so the switchover was relatively easy. The XM module is mounted behind the glove box. The most difficult part about the install was removing the 7mm screws that hold the XM bracket in place. Upon removal, I mounted the new module in the XM bracket with the included self tapping screws & double face tape. I also reversed the clips for the 7mm screws on the XM bracket making them much easier to re-install. I removed the yellow clip on the factory XM antennae so I could reuse the XM antennae. I placed some silicone around the base of the antennae to keep it from coming loose and zip tied the cable in place. Much easier and than installing the Sirius antennae and it works just as well.

The unit's performance is similar to the XM one that I removed. All the correct info is displayed on the head unit and it works with the steering wheel controls. The sound quality is comparable to the XM unit. The only difference in performance vs. XM is that it does not respond as quickly when using the dial to change channels.

Overall it was definitely worth the switch!

Easy install but has flaws...

Written By Matt, Toms River, NJ on Wednesday, July 26, 2006

Crutchfield Customer Review (What's this?)

I installed the SIR-GM1 on my 05 Chevy Trailblazer w/ factory XM. The install was super simple. It involved unplugging the XM reciever found under the passenger side dash and plugging in the SIR-GM1. The manual says that you cannot use the stock XM antenna but I found that to be BS. On my car I could remove the plastic clip from the XM antenna end and it fit and works with the SIR-GM1. It doesn't fit as snugly as I would like and there is a possibility of bending the connector if you are not careful but it is better than having a second ugly antenna if you ask me.

The problem I had with the unit is that it works so/so with the navigation system. It still displays XM on the screen instead of Sirius which is kinda annoying and whenever you change the settings or switch to navigation on the screen, it loses your current Sir channel when you go back to Band. Also when you change the category with the category button it just goes back to the default weather channel of 184 (or sometimes the 1st preset). This means to get from Channel 1 (Sirius Hits) to Channel 100 (Howard Stern) you have to turn the dial til you get there. You can however set your presets as normal and the text shows up great.
Sound is also pretty good (better than FM modulated) and it is nice to have a hidden tuner.
This gets a B+ from me. I would like to see it work properly with the Navigation especially since it was delayed to market so many times.

To Complex

Written By Paul, Los Angeles, CA on Wednesday, July 26, 2006

Crutchfield Customer Review (What's this?)

Not Worth the headache, When you can get a starmate or similar unit spending $99.99 for a unit that is not designed well is not worth the money or the headache.
The cable is way to short so you can't swap the unit with the xm, you can't use the power you need to run a new 12v Power Supply, and then your left with running an antenna cable outside.

Not For Amatuers

Written By Jon, Norristown, PA on Tuesday, July 25, 2006

Crutchfield Customer Review (What's this?)

Bought this unit for my 2004 Monte Carlo. Crutchfield's disassembly instructions are great, however, watch removing the dash, I was impatient and broke my hazard switch assembly. As for the unit, the patch cables are too short and couldn't figure out where to mount the unit. Also, unless you're replacing an existing factory unit you have to run your own power feed, there's no patch into the factory power & ground cables.

Great Product, Not So Fun Install

Written By Dave, East Providence, RI on Tuesday, July 25, 2006

Crutchfield Customer Review (What's this?)

With my first outing with Sirius being with the Clarion SIRCL3 adapter, I had to get this unit for my wife's Chevy. I was originally going with XM, but because of Terk and their inability to deliver a product I went with the Clarion SIRCL3 to go in my car. After trying out both services (XM at home via Directv and Sirius in my car) I belive that Sirius is the superior service. While they do not have the amount of channels XM has they do have XM beat in the programming dept. I've talked about the service now on to this product. Like I said earlier I bought this to interface into my wive's Chevy. And it does. Everything is included to make this happen. SOund Quality is there. The factory radio is functional as a control for the unit. Installation took me about 3 hours. Longer than I would have liked. Mostly getting access to the radio was the biggest time consumer. A few notes to have when you start the project, Wire the unit to a constant 12 volt supply. I had wired to a switched ACC lead and it would reset the presets on every power up. Choose a location for the unit first The cable that connects between the factory wiring and the headset and Sirius unit is only about two feet long, giving only a limited amount of mounting options. 5 stars on the product and 4 to the installation of the unit. If you want Satalite radio and own a GMC vehicle I hold this unit in high reguards. It's also cheaper in price than the XM unit is.

Hands-on research

What's in the box?

Download owner's manual

  • Sirius Satellite Radio tuner
  • Magnetic Sirius antenna with attached 21' cable (right-angle single SMB connector)
  • Factory SDAR interface cable
  • T-harness interface cable
  • Power harness with in-line fuse and filter
  • 5.5" Rubber adhesive backed antenna cable cover/tail
  • 6 Self-tapping screws
  • Antistatic cleaning pad
  • Installation Guide
  • SIR-GM1 Applications list
  • Cadillac CTS Installation Modification sheet
  • Warranty information

Product Research


Overview: The SIR-GM1 is a Sirius Satellite Radio tuner that is compatible with select 2003-2008 General Motors vehicles. The package includes the proper interface cables and a magnetic Sirius antenna. In addition to the tuner, a subscription to Sirius Satellite Radio programming is also required.

Compatibility: The SIR-GM1 is designed to be compatible with select headunits from 2003-2008 GM vehicles that operate on the Class-2 bus. In many cases, the tuner can replace the factory XM Satellite tuner. It is also compatible with some systems that support Satellite Radio operation, but did not come with a tuner from the factory. Compatible headunit types include CD only, CD + Cassette, and 6-CD changer headunits, as well as Touch Screen and Non-Touch Screen monitor headunits. The factory radios in the majority of the compatible vehicles must have a "BAND" button. In some cases, the radio must have a factory satellite connection (noted by an asterisk in the chart below). The SIR-GM1 is compatible with most additional factory audio accessories that might be included, such as Rear Seat Audio Control Center, Rear Seat Entertainment (DVD/Monitor) System, Heads-up Display, and Steering Wheel controls.

Compatible Vehicles: The current list of compatible vehicles includes:

Buick Chevrolet Chevrolet cont'd GMC cont'd Pontiac
Sierra/Sierra Denali
Yukon/Yukon XL


Grand Am
Grand Prix
Montana SV6




Express Van


Denali/Denali XL
Escalade EXT/ESV*
Monte Carlo





Savana Van

* Radio must have factory satellite connection.
**Slight modification of the Factory SDAR Interface cable is required.

Tuning Features: The SIR-GM1 is designed to emulate many of the factory SDAR (Satellite Digital Audio Radio) commands found in the vehicle, including Channel Tune (up/down), Fast Tune (up/down), Category Search (up/down), Category Tune (tune within a category), 12 presets (6 for each band), and Preset Scan (up).

Display Capability: When the SIR-GM1 is installed it has the capability to show the following information on the headunit display: Channel Number, Channel Name, Category Name, Artist Name, and Song Title Name. The number of characters displayed in the Artist Name or Song Title Name varies by headunit type (8 or 16 characters). Text Scrolling and/or Paging is not supported with the SIR-GM1.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.