PAC C2R-GM11 Wiring Interface
Connect a new car stereo and retain RAP and safety warning chimes in select 2006-up General Motors vehicles
Item #: 127C2RGM11
Your price: $69.99 Earn up to 70 Rewards points
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Item #: 127C2RGM11
Your price: $69.99 Earn up to 70 Rewards points
PAC's C2R-GM11 radio replacement interface lets you replace the factory radio in select GM vehicles without OnStar, while retaining all factory warning chimes, Retained Accessory Power (RAP), and audible turn signal indicators. Warranty: 1 year.
Please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to find out if this model is compatible with your vehicle.
Note: Most vehicles will require additional installation parts please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.
The wiring is color coded to match the after market radio , this stuff is pretty standard - Once you have this connected to the head units its just a plug and play to the Chevrolet wiring harness - The chime device has an on off switch, I left it on , the tone is lower and deeper than the original and didn't know until I used this device that my turn signal clicks came through the speakers .
Pros: No surprises , it worked and the wiring matched the after market unit
Cons: There were none .
Color coded made for an easy install. Door chimes and Blinker sounds work well, just make sure when installing behind the radio to face it with the speaker side towards the steering column or front towards the ignition shifter otherwise it is hard to hear the blinker.
Pros: Easy install.
Cons: Hard to hear the blinker when radio is on or windows are down but otherwise it does what it is suppose to do.
The PAC unit worked perfectly and install was a breeze. My door chime and turn signals work fine. I would recommend this to any one who is thinking about getting an after market head unit.
Pros: Easy install..Wires were color coded and made the install easy. Unit was small enough to tuck inside dashboard under new head unit.
This made the stereo installation very easy. Just strip a little insulation off the wires on this adapter and the radio harness, match up the colors, and crimp them together. It couldn't be easier! The tones and turn signal clicks that this unit puts out are pleasing. I'd use this one again!
Pros: Very very easy installation. Even if you have never installed a car stereo before, you can do this!
Very easy installation, and allows retention of factory controls and chimes, as well as delayed shut-off (for when you turn off the ignition and the radio stays on until the door opens). Can't beat it for the price.
Pros: Easy to install, takes the place of the scoche-style harness.
Cons: A little lacking in the instructions, but fairly intuitive nonetheless.
Everything worked as it should like the factory unit. The subwoofer was configureable and everythign else worked like a factory install.
Pros: Easy install
Cons: Thought the chimes would play through the speakers
Simple to use and very necessary.
Pros: It's ease of understanding.
Wired in simple and works great an i still have my turn signal noise and head lamp on chimer,
Pros: easy install and needed.
The instructions provided were in detail and easy to understand. All attribute that apply to the vehicle were duplicated as far as alerts.
Pros: Ease and simplicity of installation certainly is a help.
Cons: Not applicable.
Absolutely necessary. Everything works as it should and just as it did with the factory head unit.
Pros: Perfect integration with my car. Great website, good support and documentation made this easy to install.
it does what it's supposed to do which is expected the only downfall is its not that loud and if you have your music at normal listening volume you cannot hear your turn signals are on or doors open or anything like that but it does keep you legal and does what it's supposed to this all that concerns me for this item.
Pros: keeps you legal.
Cons: Volume is to low and price is to high
Great buy if you need to keep factory controls
Hooked up OK but you can't hear the turn signals any more.
Dealing with Crutchfield is always the best. They said I needed the PAC C2R-GM1 for my steering controls to work a turn sig. to be heard and would give a great deal if ordered with radio. Very easy to install when doing radio it was a no brainier not to. Works very well. Thanks Crutchfield
Pros: All Good
The blinker sound is so faint, It's impossible to hear with the radio on or a window open, I like hearing my blinkers, We all hate when people drive with their blinkers on, because they cant hear them. And the ding when I open my door is so loud its horrible. All the sounds comes from the little blue box, once that is behind your radio and dash, Forget about hearing anything.
Pros: Easy to install
Cons: HORRIBLE SOUND
Works great. Does what it was intended for.
Pros: Easy install
There must of been a short in the old one because my car makes sounds I did not remember hearing! lol Reminder bells, turn signals
Was easy to install and all factory options are working as they should.
Pros: Is a must have for some vehicles.
Cons: Pricey even at half price.
Without a doubt this is need when upgrading to an third party radio in many GM cars. Easy to wire into the harness and works perfectly.
Pros: All warnings are still audible when using this unit.
Cons: Could be just slightly louder but it's still able to be heard.
Worked perfectly on an '06 HHR to adapt a JVC KW-R900BT and iDatalink Maestro ADS-MSW. Did require one undocumented wiring change to supplied harness to use the Maestro, but exactly as directed otherwise. Made installation simple, with no changes to factory harness required. Chimes and turn signal sounds work through adapter as intended.
Pros: Simplified installation.
made installation of my new equipment very easy, and retained all the vehicle warning sounds.
Pros: easy install
Made installation very easy
Works as described
I like most people, did not want to spend extra money on an adaptor, but GM routes a lot of warning sounds through their factory radios. Crutchfield gave it to me at a discount when I bought a receiver. Hooked up easy with color coded wires that matched my receiver output harness wire ends. I did this on my kitchen counter with good light and used the posi-twist connectors. The 2 pre-attached outputs from the adaptor snapped into the 2 from the vehicle, and I then easily installed the head unit in my car without doing wiring connections in the vehicle.
Pros: tailored made for my car, straight forward install, works great.
Cons: none, except GM shouldn't force one to have to buy an adaptor in the first place with this type of design.
Just as it says plug and play all you have to do is wire your radio wires to this harness then plug into car and into radio and your done. For 99 dollars i got what i payed for and it works perfect.
Pros: Works perfectly
Cons: Was 99 dollors and you have to make sure its as close to your dash by radio or its hard to hear.
Product works as described. Pretty much plug and play with a few wire crimps.
Pros: Chimes working for the first time in a year.
Cons: Price of component. This much for a box that makes chimes. I got mine for half price, which was still slaty for what it does.
I hate that a adapter like this has become needed in new cars but it has. I will say that it was easy to hook up and it worked as it should so no complaints there. I just wish that it wasn't needed lol.
Pros: Works perfect
Cons: Seems like it should not be needed but the nature of the beast I guess
A little skeptical reading reviews about Turn Signal sounds. Works like charm and sound is fine. very satisfied
Pros: Works as advertize!!
Cons: Needs a peel and stick tape to anchor unit
Kind of wish I didn't have to waste money on this. If you're not great at keeping an eye on your turn signal when switching lanes you may be in for some trouble. If you don't turn enough to automatically turn off your turn signal you won't be able to hear the audible clicking reminding you your turn signal is still on.
Pros: Get to keep factory chimes. Easy to install.
Cons: When you install this your Audible turn signal no longer plays through the front driver speaker. It will now play through this exact box and it is extremely quiet. If I have my deck up half volume I can't even hear it anymore. Seems pretty expensive for what it does.
Works fine in a 2006 chevy hhr..
Pros: works (i guess, if you have the radio turned down), easy to install
Cons: not sure why its needed, its so quiete and not the same sound almost feel like i was possibly wasted my money... Sound comes from that little blue box now, not the speakers anymore, and the wires were so short its impossible to get it closer to the driver, must be stuffed behind the radio, would work great if you could get it all the way to the B pillar right beside the drivers ear.
I bought this along with my Kenwood deck. Install was easy enough as it includes the wiring harness kit to hook up to my 2009 cobalt.. few minutes of strip and crimp and its good to go.
The first unit I recieved had a malfunction I guess.. everytime I used my turn signals the radio would lose power and the signal chimes would cut out. After 3 or 4 calls to tech support we tried a few things, and identified it was a faulty interface. They sent me a new unit which I have now installed and it works beautifully.
Everyone of the guys at Tech support I talked to were professional and courteous.. so much in fact that because of them, it is doubtful I will buy a car stereo, or any mobile electronics for that matter, from anyone else other than Crutchfield from now on. Kudos.
2008 Pontiac G5 base model. Had my old Pioneer that i loved and wanted to expand the audio over time. Was obvious the factory head had to go!
Yes the reviews are right the turn signal chime or click or what ever is a bit weak sounding.
Depending how you "stuffed" or mounted the box behind the head unit depends on how loud the seat belt warning is.
I heard and read plenty of forums and sites claiming there are cheap harnesses available but I knew that this was the correct route to go. Why chance screwing anything up. Yes a bit pricey, But Crutchfield advisors were a HUGE help and this unit is awesome. Go cheap, pay in the end, do it right the first time.
Buy the unit..lol
I bought this for my 2008 cobalt and I am glad I did. It was quick and easy to set up and it worked with my car. The only thing I do not like is that the turn signals sound different, but I am glad that I still have the factory sounds.
Did not work for my 2008 Cobalt. I had it professionally installed with my new double din head unit, and he said the chime box didnt work at all. He had to cut it all up to get to just the wires he needed.
Works great in a 2006 HHR made the install really easy........
Aside from the time it took to connect this to the radio harness, it made the install really easy. Hardest part was finding a place to tuck the unit in to the dash behind the radio. All the chimes work but the blinker sound is a bit low in volume.
Overview: The PAC C2R-GM11 Radio Replacement Interface allows easy connection of an aftermarket stereo in select General Motors vehicles; please see "Outfit My Car" to confirm compatibility. This interface provides connections for the new radio's power, illumination, and speaker leads. With the C2R-GM11, the new radio will replicate all factory chimes and audible turn signals. It also provides a data bus generated 12 volt accessory output, so the factory RAP system remains intact (Retained Accessory Power, RAP, keeps the radio powered after the key is removed from the ignition until the driver's door is opened, or ten minutes passes, whichever comes first).
Steering Wheel Controls: If your vehicle has steering wheel controls (and the aftermarket radio is compatible) they can be integrated using the optional PAC SWI-RC steering wheel control interface (541SWIRC, sold separately).
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.
Whenever possible, you still want all your cars features, that may have been controlled by your factory radio, to still work properly. [ Armand Dec 18, 2015 ]