Metra VT-GMRC-01 Wiring Interface

Install a new car stereo and retain factory door chimes and audible safety warnings in select GM vehicles without OnStar®

Item #: 120GMRC01

269 Reviews

This item is no longer available.

Original Price: $79.99

Shop all Factory System Adapters

Does it fit my car?

Select your car

Find what fits your car

Problem: Installing an aftermarket receiver in many late model GM vehicles means losing the chime that warns the door is open, along with audible safety warnings.

Solution: Metra's VT-GMRC-01 GM Class II Data Bus Interface lets you replace the factory receiver in these vehicles and keep the door chime and all audible safety warnings.

Hook the VT-GMRC-01 to your aftermarket radio, mount the module in a location where the chime can be heard, and plug it into the existing factory plug. Get the great sound you want, and keep all important safety features intact. The VT-GMRC-01 will not work with OnStar equipped vehicles. 1-year warranty.

Important Note: Because your vehicle is factory-equipped with a special sound system, you will need to purchase this VT-GMRC-01 interface in order to keep your factory door chime (needed to keep audible safety warnings functioning) while providing a switched 12-volt power source for your new radio. If you do not use a compatible interface when you replace your factory radio, you will disable the audible warning system in your vehicle. Crutchfield cannot provide a free wiring harness for your vehicle, and we strongly recommend that you use the recommended interface when replacing this vehicle's factory radio. Failure to do so may result in serious injury or death.

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.

Metra VT-GMRC-01 Wiring Interface Reviews

Average Customer Review:

269 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $350 rewards card


Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

Good product

Written By Wyatt, Phoenix, AZ on Wednesday, September 10, 2014

Crutchfield Customer Review (What's this?)

Product works as described, other reviews are correct, it is very loud even after breaking the board connection to quiet it down. I muffled it some with some foam and almost sounds factory now. Did have a problem initially because the unit fed power back through the accessory wire making the vehicle think it was still powered up on accessory. Worked fine after installing an inline diode.

Pros: Great option to keep factory chime.

Cons: Loud but would rather have that then to quiet, can always muffle it. Power leaks back through accessory lead.

Wired wrong but easy to fix and works great.

Written By ShaneB, Missouri on Tuesday, September 09, 2014

Crutchfield Customer Review (What's this?)

This device was wired wrong for my 2005 GMC Sierra Crew Cab w/o Bose or Onstar but it was an easy fix and is working great.

The pink data wire was in the wrong spot on the connector. When I initially plugged it in it dinged 5 times, the time displayed on the radio for 5 seconds then went blank. I tried to turn the ignition key off and back on but nothing worked at that point. I could recreate the problem by unplugging the Metra unit and plugging it back in.

Tech Support walked me through where the wire should go and I moved it. It's one of those mini multi-tabbed female connector pins so I wasn't able to get it out. I had to carefully cut the connector to get it out but I'm ok with that.

This wasn't a big deal, but I wanted to mention it in case anyone else runs in to this problem. It may have just been that one unit that was wired wrong, I don't know. But Crutchfield Tech Support was great in helping me with it. And they asked me if I wanted a new unit instead of changing the wire position. Can't ask for more than that.

Even with the tracing cut to lower the volume it's too loud so put some electrical tape around it to cover the sound holes in the case. It wasn't that bad when I tested it outside of the dash and I thought that being inside the dash would lower the volume of it, but it actually made it louder.

I would have given it 5 Stars if not for the pin placement problem.

Pros: It works as described.

Cons: Had to change a wire position in the connector.

GM Interface

Written By Monk, Nashville , TN on Thursday, September 04, 2014

Crutchfield Customer Review (What's this?)

Good product

Pros: Ease of install , volume control

Great chime

Written By RonS, Lansing, Mi on Monday, September 01, 2014

Crutchfield Customer Review (What's this?)

Brings back the door open, blinker, and light on chime when putting in an after market radio

Pros: Works great

Cons: A little loud at times but I still like it


Written By Doug E, Salina Ks on Monday, August 18, 2014

Crutchfield Customer Review (What's this?)

I was a little disappointed with this unit. It works fine and does the job but had to tape it together ..the case wouldn't stay snapped together. and omg it is loud! The instructions tell how to cut a circuit on the board to lower the volume but you have to take everything back apart to make the adjustment.

Pros: does the job ... chimes work like factory did

Cons: just feels clunky and kinda cheap loud ..really instructions left a little to be desired

Good Interface.

Written By DougG, Springfield, MO on Monday, August 18, 2014

Crutchfield Customer Review (What's this?)

works just like it's supposed to.

Pros: all. installation instructions good.

Cons: none.

works great

Written By Anonymous, Sheridan, WY on Thursday, August 07, 2014

Crutchfield Customer Review (What's this?)

Works great its loud you'll need to remove cover and cut a trace to lower the volume most likely

Cons: Heavy discount with a head unit

Metra VT-GMRC-01 Wiring Interface

Written By Smiley, Page, Az on Thursday, August 07, 2014

Crutchfield Customer Review (What's this?)

Plugs were exact match but wiring instructions need to be reviewed for completeness.

Pros: Plugs did match existing wiring with no problem.

Cons: instructions/color code was not as good as some I have seen, but was able to make it work first time

Don't install without it!!!!

Written By Jesse, Bath PA on Monday, August 04, 2014

Crutchfield Customer Review (What's this?)

This little baby made life a whole heck of a lot easier!!! Its so much nicer to have a separate chime instead of playing the chime through you car speakers.

Pros: Compact for easy placement Length of wires is good Super loud, so try aiming into your dash, not out from it, and it also has the ability to lessen the volume but only by opening the unit and cutting a solder point. I recommend holding off on that step unless you absolutely need to.

Cons: Had a wiring issues, was told its a typo on the directions, but ended up splicing the power antenna (from harness) wire to my amp remote (from sub) and power antenna wire (from radio) to make it work properly. solved my issue.

No luck with this adapter

Written By Anonymous, Charlotte, NC on Saturday, August 02, 2014

Crutchfield Customer Review (What's this?)

Easy to install, a little loud, but better than nothing. The problem is maybe the quality, chimes when it feels, sometimes chimes when no supposed to do it. I little disappointed with the adapter, since is a process removing from behind the radio for return it.

Pros: Keep audible factory warnings.

Cons: Little loud, but you can make it lower by cutting a copper track on circuit board.

Plug-n-play The Metra VT-GMRC-01

Written By shadetree, Iowa on Monday, July 28, 2014

Crutchfield Customer Review (What's this?)

This was so simple I was completely surprised. It retained all the GM warning chimes as advertised while adapting the factory harness to the universal care audio color codes.

Pros: As stated plug-n-play.

Cons: The noted audio alert volume reducing solder joint on the PCB, could easily have been pigtailed to the outside harness of the box with a simple disconnect joint for users to test the audio warning sound levels.

Metra Adapter

Written By Guzda, Valparaiso, IN on Monday, July 28, 2014

Crutchfield Customer Review (What's this?)

Very nice unit and well made. Very good instructions and easy to understand.

Pros: All the wires were color coded and well marked. Everything went well with the wiring assembly.

Cons: None that I could find. My new unit worked fine as I installed it.

Get Another Product If Available

Written By VA Steve 55, Leesburg, VA on Tuesday, July 22, 2014

Crutchfield Customer Review (What's this?)

I used this adapter on my 2004 Silverado 1500 to install a JVC deck. This adapter does work and simplifies the wiring, but it has shortcomings. First and foremost, I found out when complete that it will not integrate with the dash light dimmer switch. Crutchfield listing has since been updated. So radio is always BRIGHT. Second, the chime box is poorly made and falls apart easily. Why couldn't they use 4 screws to assemble it? Had to tape it together. I'll live with it since the radio works, but if I had to do it over I would use a different brand.

Pros: Accurate wire diagram instructions and clearly marked wires, radio worked on first try.

Cons: Chime unit box cheaply made and must be repaired to keep it together. Does not work with factory dash light dimmer.

Metra VT-GMRC-01 Factory Integration Adapter and '07 Silverado Classic

Written By CK, Worthing, SD on Tuesday, July 15, 2014

Crutchfield Customer Review (What's this?)

works good, easy to install, too loud even after cutting circuit path per instructions to switch from loud to less loud

Pros: works well.

Cons: if you didn't cut circuit, at least in my truck, you wouldn't be able to stay in the truck when door chimes are going off, way too loud.

Metra VT-GMRC-01 Wiring Interface

Written By Anonymous, Laurens, SC on Thursday, June 26, 2014

Crutchfield Customer Review (What's this?)

This part works perfect

Pros: Easy to install and works perfectly with my car

Cons: None

Easy to connect

Written By Nate, Leesport, PA on Friday, May 16, 2014

Crutchfield Customer Review (What's this?)

Works great, the volume can be easily reduced significantly by cutting a single circuit path marked (highly recommend as its too loud unless you muffle it against the vehicles carpet) flimsy shell, easy to fit or mount, decent length of wire

Pros: Good length of wire, easy to wire up

Cons: Flimsy shell that houses circuit should be zip tied through it's own screw slots across as it can fall open while you are trying to mount

Works, sort of...

Written By wenjen4, Allen, Ok. on Friday, May 02, 2014

Crutchfield Customer Review (What's this?)

Build quality seems fine, and the volume was just fine. Wires were long enough to give me several mounting options. I did have a problem getting power to my head unit. The tech advisor helped me determine that there was a pin out of place on the factory harness. He helped me jump the wire and it worked! Can't say enough for the tech advisors patience and knowledge. Lefty was particularly helpful, although I talked to several other advisors and they were all wonderful.

Pros: Tech advisors were AWESOME!

Cons: Don't know if the pin was out of place on the adapter, or on my factory harness. But I'm inclined to think it was my truck. It is one of those Ok/Tx special packages with goofy RPO codes.

Great product

Written By Joe W, Wilkes-Barre,PA on Thursday, April 10, 2014

Crutchfield Customer Review (What's this?)

Loud and clear. Works perfectly with aftermarket radio in a 2005 Chevy Classic

Pros: easy to hook up, instructions clear

Cons: none


Written By Jason, Hanford ca on Sunday, April 06, 2014

Crutchfield Customer Review (What's this?)

Great and easy

Pros: Perfect

Cons: None

Metra VT-GMRC-01 Factory Integration Adapter

Written By RichardH, Waldoboro, ME on Friday, April 04, 2014

Crutchfield Customer Review (What's this?)

Worked very well. Perfect results

Pros: Result of use perfect.

Cons: Needed more information especially about the ground wire. Luckily I had my own extra wire to connect with my particular unit.


Written By ponyboy, mpls MN on Thursday, April 03, 2014

Crutchfield Customer Review (What's this?)

works great

Pros: easy install

Cons: none

Must have unit...

Written By Barry, Lititz, PA on Friday, March 28, 2014

Crutchfield Customer Review (What's this?)

A little louder than OEM, but works good. This is a must when replacing your factory head unit.

Pros: Everything

Cons: A little loud

must have item

Written By mikem, denver,co on Thursday, March 20, 2014

Crutchfield Customer Review (What's this?)

a must have item for your installation for safety reasons and ease of installing the receiver

Pros: easy to fallow instructions

Cons: needs the connectors for splicing the wires to the radio wiring harness

Needed Item ...

Written By Steven T. ..., Irving, Tx. on Monday, March 17, 2014

Crutchfield Customer Review (What's this?)

Do Not Try the install without this item, it is a critical piece and easy to install and mount.

Pros: Everything

Cons: None

Great Product

Written By WhtWlf80120, Denver on Friday, March 14, 2014

Crutchfield Customer Review (What's this?)

A little louder than oem, but works good.

Works fine - case comes apart too easily though

Written By AndrewD, NorCal on Monday, March 03, 2014

Crutchfield Customer Review (What's this?)

The unit seems to work fine. The plastic housing comes apart too easily and doesn't completely mate together, so I put a zip tie around it and through the mounting holes. Sometimes the chime keeps going after I remove my key, so I have to reinsert and remove my key again to make it stop. That only seems to happen if I turn off my ignition and remove my key quickly.

The wiring harness was great for an easy install. I soldered all my connections to my new radio's harness and used shrink tubing to make it insulated and nice. My only complaint is that the illumination wire didn't do anything in my 2005 Silverado. Turns out the GM factory harness doesn't have a wire going to the illumination dimmer port on the connector, so I ended up T-splicing that wire into the brown/white wire running to the HVAC controls and it works fine now. If you're unsure of which wire to split, use a multitester. The voltage on the dimmer wire should vary as you adjust the dimmer control. This only works when the headlights are on, so you may need to cover the day/night sensor on your dash to get the lights on in the daytime.

To the people complaining it is too loud - there are instructions on how to decrease the volume in the pamphlet that came with the device. It involves cutting a circuit on the board.

Pros: Wiring harness makes install easy Retain warning chimes

Cons: Illumination/dimmer wire does not work on 2005 chevy Silverado - have to splice into HVAC dimmer wire Plastic housing falls apart easily. Had to zip tie mine closed.

To easy

Written By Anonymous, Schuylkill haven on Saturday, March 01, 2014

Crutchfield Customer Review (What's this?)

Just what I needed

Simple installation, easy to follow instructions

Written By That one guy, Kansas on Friday, February 28, 2014

Crutchfield Customer Review (What's this?)

Really easy to install. Nice long wire, makes the connections easy. It Is a bit loud I tried to tuck it in the dash to muffle it. Other reviews say to put a piece of electrical tape around it, that might be a good idea.

Pros: Easy to install

Cons: Just a bit to loud.

Makes radio swap easy

Written By Kevin C, Wheeling,WV on Wednesday, February 19, 2014

Crutchfield Customer Review (What's this?)

Makes installing an aftermarket radio simple. I was able to keep the door chime with this adapter.

Pros: Easy install. Was able to keep door chime.

Cons: None

Trouble Maker

Written By Anonymous, Parkville, MD on Monday, February 17, 2014

This adapter "confused" the BCM in my 2005 Colorado. After following all the instructions - exactly - step by step- and reconnecting me truck battery my POWER DOOR LOCKS and my DRIVER'S WINDOW would not work!

After calling tech support I found out that this is not an uncommon problem. On line forums are also full of other frustrated consumers with the identical problem! Why wasn't this issue even hinted at in the product description? I stopped to talk a local car audio store. They checked in their data base and found the there was a warning about this very issue.

Finally - after two weeks and numerous fix attempts suggested by Crutchfield and the on line forums the problem resolved itself. I say "itself" because one morning everything was working again after not working the night before.

Ask a lot of questions before you buy this adapter for your car/truck.

gm adapter

Written By reloader760, san marcos, ca on Sunday, February 16, 2014

Adapter is great if you don't want to cut wires, but chime is loud and annoying.

Pros: Easy install

Cons: Loud chime

Metra VT-GMRC-01 Factory Integration Adapter

Written By Trbsami, Indianapolis, IN on Saturday, February 15, 2014

Crutchfield Customer Review (What's this?)

As others said, it`s plenty loud. I put 2 layers of duct tape on and it`s perfect. Since I replaced all my speaker wire, I did not use most of the wires to the factory, but it was still worth having.

Pros: Good instructions.

Cons: none

Metra VT-GMRC-01 Wiring Interface

Written By Anonymous, deridder, louisiana on Tuesday, February 11, 2014

Crutchfield Customer Review (What's this?)

Worked as advertised

Pros: Easy to install and worked good

Cons: Not crazy about the sound of the chim

Worked Great

Written By Vincent, D.C. on Tuesday, February 11, 2014

Crutchfield Customer Review (What's this?)

I did receive a bad one, it made all my gages zero out, inconsistent chimes and random alerts on my dash display such as check brakes. I sent it back, switched out the box, not the wires, and it worked perfectly.

Pros: easy install

Cons: Loud

Silverado 2500/Integration Adapter

Written By Bob, Richmondville, NY on Wednesday, February 05, 2014

Crutchfield Customer Review (What's this?)

Easy install. Works exactly as advertised. I do suggest soldering connections and using shrink tube insulation over the connections. My only complaint is that the unit is far louder than the original. At some point I will cover half of the speaker in the adapter with a piece of tape or wrap it in cloth.

Pros: Works as advertised.

Cons: Very loud, but that can be addressed.


Written By Anonymous, Delran, NJ on Tuesday, January 14, 2014

Crutchfield Customer Review (What's this?)

Works Great, easy to follow instructions.

Easy, clear instructions, makes it easy to connect new receiver

Written By SiddR, Temecula, CA on Monday, January 13, 2014

Crutchfield Customer Review (What's this?)

This unit made it very easy to connect my new receiver. Instructions were clear and there were instructions for all wires. Plugged into my car's factory harness with ease.

Pros: Makes connecting a new receiver easy.

Cons: The chimes speaker doesn't have a volume control. Sounds too loud.

Perfect Fit

Written By DonH, Clarksville TN on Monday, January 06, 2014

Crutchfield Customer Review (What's this?)

Fit my application perfectly. Installed JVC stereo into 2005 Silverado with no hassle at all.

Pros: exact fit

Cons: makes the tones a little louder than factory

Metra VT-GMRC-01 Wiring Interface

Written By Anonymous, Piedmont, SC on Thursday, January 02, 2014

Crutchfield Customer Review (What's this?)

Instruction made install so easy, did it our selves, the chimes are not that loud as some refer to.

Pros: easy to follow instructions

Great easy harness

Written By Brian, San Clemente, CA on Tuesday, December 31, 2013

Crutchfield Customer Review (What's this?)

Great product easy to install. Crutchfield is great

Pros: Simplicity price

Cons: Confusion about dimmer wire

Hope the replacement lasts longer than 2 minutes

Written By SC, Nelsonville, Ohio on Sunday, December 29, 2013

Crutchfield Customer Review (What's this?)

Looked easy to install and was easy to install.

Pros: Good instructions, no problems at all

Cons: Worked for one minute and the box shorted out. AJ at customer support was very friendly and ran me thru some tests and determined that the unit was bad. At least it's a plug in replacement and no additional splicing is needed

Metra VT-gmc-01 Factory Integration Adaptor

Written By Coltsfan, Tuscola, IL on Wednesday, December 25, 2013

Crutchfield Customer Review (What's this?)

Nice quality, wired up easy. Great transaction with Crutchfield