Skip Navigation

PAC C2R-GM11B Wiring Interface

Connect a new car stereo and retain safety warning chimes in select 2004-08 Chevrolet and Pontiac vehicles w/o OnStar

51 Reviews | 4 questions - 5 answers

Item #: 1272RGM11B

In Stock

Add to Cart

Ask an expert

Our VA-based experts can help.

1.888.955.6000

ChatEmail

Add to Cart

PAC C2R-GM11B Wiring Interface

Overview

Our take on the PAC C2R-GM11B Wiring Interface

PAC's C2R-GM11B radio replacement interface lets you replace the factory radio in select 2004-up Chevrolet and Pontiac vehicles that aren't equipped with OnStar®, while retaining all factory warning chimes and audible turn signal indicators. Warranty: 1 year.

PAC C2R-GM11B

PAC's C2R-GM11B radio replacement interface lets you replace the factory radio in select 2004-up Chevrolet and Pontiac vehicles that aren't equipped with OnStar®, while retaining all factory warning chimes and audible turn signal indicators. Warranty: 1 year.

Please enter your vehicle information or call an 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.

Installation was a breeze. marrying the wires together took only 10 minutes. Very straight forward and worked like a charm. (I am a first time stereo installer) I recommend this product!

Agey K, Jacksonville, NC

What's in the Box:

  • GMLAN warning chime and radio replacement interface
  • OEM to interface adapter harness
  • Installation instructions
Reviews

PAC C2R-GM11B Wiring Interface Reviews

Average Customer Review:

51 Reviews

Great buy

Agey K from Jacksonville, NC on 8/6/2016

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Installation was a breeze. marrying the wires together took only 10 minutes. Very straight forward and worked like a charm. (I am a first time stereo installer) I recommend this product!

Pros: Easy install

Cons: None

Wireing interface

Dan from Belvidere Il on 6/11/2016

2006 Pontiac G6
Crutchfield Customer Review (What's this?)

It worked great and very easy to install would recommend to anyone

Pros:

Cons:

Excellent

Anonymous from Eugene, OR on 5/18/2016

2005 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

Works as it should

Pros:

Cons:

PAC C2R-GM11B Wiring Interface

Kyle from Fargo, ND on 5/12/2016

2005 Chevrolet Malibu Maxx
Crutchfield Customer Review (What's this?)

This product does its job. It connects easily into the existing wiring, just plug it into the stock wiring harness connected to the stock stereo unit.

Pros: Quick, simple

Cons: Very little instructions included

PAC C2R-GM11B Wiring Interface

Anonymous from independence, MO on 3/27/2016

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

All worked as directed

Pros: All easy to install

Cons:

excellent product

Frank from Victorville CA on 3/14/2016

Great product if you want to keep all your warning chimes.

Pros: Easy installation

Cons: None

Great product

Ozema A from Belden,MS on 3/6/2016

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

It works like a charm happy to have my cd player working

Pros: easy to install

Cons: na

Sufficient

RNEMT from West Richland, WA on 1/30/2016

2006 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

Luckily, some of the wires were taped off as not needed. I just wish the wiring colors would match instead of having to call Crutchfield for assistance.

Pros: Labels in place for wires not needed.

Cons: The chime is absolutely annoying and the car one still worked, so I manually shut it off.

PAC C2R-GM11B Wiring Interface

Elisabeth from lewisville, TX on 1/23/2016

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Great product

Pros:

Cons:

Great

Ahmed R from Rogers, AR on 10/30/2015

Crutchfield Customer Review (What's this?)

Fits perfectly and exactly . Plus combined with a stereo and speakers it was half what it is in local stores.

Pros:

Cons:

Wiring Interface

LauraB from Hawaii on 10/9/2015

All you have to do is connect the speaker wires by color and use wire end connectors. The other stereo wires are in a plug that fit my car's plug. Easy! A car stereo dealer quoted me a $200 price for this harness! Plus I didn't have to pay for installation because of the good instruction booklet. I'm not at all handy and it was easy!

Pros: Everything

Cons: None. You lose your temperature gauge, but there is no way to recover it.

Wiring Interface

JimB from Hawaii on 10/9/2015

2005 Chevrolet Malibu Maxx
Crutchfield Customer Review (What's this?)

All you have to do is connect the speaker wires by color and use wire end connectors. The other stereo wires are in a plug that fit my car's plug. Easy! A car stereo dealer quoted me a $200 price for this harness! Plus I didn't have to pay for installation because of the good instruction booklet. I'm not at all handy and it was easy!

Pros: Everything

Cons: None. You lose your temperature gauge, but there is no way to recover it.

Complicated

Bbass from Ohio on 9/28/2015

2006 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

After you get done with this Very tricky install it works flawlessly just have to get to that point first

Pros: Works just the way it's supposed to

Cons: Very tricky install

Great Product

Jeremy H from Cincinnati, OH on 9/14/2015

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Great product that made install go quick and removed what used to be a major headache from the install process.

Pros: Easy to use, clear instructions, straightforward installation

Cons: None that I have noticed

Excellent

Red B. from Texas on 9/10/2015

2007 Pontiac G6
Crutchfield Customer Review (What's this?)

Excellent product ! Glad to know that someone took all the guess work out of installing after-market equipment in late model vehicles !

Pros: Direct connection to late model vehicle wiring system !

Cons: Cant think of anything bad to say about product !

Great product. Perfect.

JohnP from Ventnor, NJ on 8/22/2015

2007 Pontiac G6
Crutchfield Customer Review (What's this?)

Worked perfect and installed easily. Great buy.

Pros: Easy. Works.

Cons: None

Little blue magic box

Anonymous from Georgia on 7/26/2015

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Easy to wire and hook up. This little blue magic box will rout the electrons through it's circuitry and enable the use of your factory wiring harness to your speakers and system.

Pros: Easy to follow instructions. It didn't let the smoke out when powered up.

Cons: We could a man on the moon in '69 but we can't make the little magic box any smaller? Really?

pac

jim w from worcester ma. on 6/3/2015

2006 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

Easy to hook up all color coded and works great

Pros: Easy installation

Cons: Not sure i really needed this in my 2006 chevy malibu since i have 2 chimes now one from the pac and one from the car but it works great.

Worked as described.

Joe T from Massachusetts on 5/1/2015

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Worked as described in my 2006 Cobalt LS Sedan w/o on star or premium audio. Has the option to add door chime, but I didn't need this to I switched it off as the 05-06 have a separate speaker for the door chime (the newer ones play through the speaker). Also used the RAP connection for the remote wire of the subwoofer I just bought. Works great. I plan to use it for one of the cigarette outlets and increase the current rating (1A normally, going to increase that for for GPS)

Pros: Works Relatively cheap considering you only need to unplug one connector to return to a fully stock system. Easy to use.

Cons: None to speak of. Heads up, a soldering iron and tape is recommended for the connections.

PAC C2R-GM11B Wiring Interface

TylerF from NY on 4/27/2015

2006 Pontiac G6
Crutchfield Customer Review (What's this?)

Great product, does what it says, no glitches whatsoever. Easy to install and a perfect fit with my Ponitiac G6 and JVC unit. Wire connections seem tight and secure without any wiggle room or slip. I would recommend this to anyone. This was my first time ever installing an aftermarket radio, sub, and amplifier. I would go with Crutchfield in a heartbeat for my next vehicle audio installation.

Pros: Easy install - Quality made

Cons: None!

Great Product!

LarryB from Amarillo, Texas on 3/26/2015

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Perfect fit, easy to install, made the installation of the new Kenwood unit into my 2005 Chevy Cobalt a snap! Easiest radio installation I have ever had.

Pros: Simple, easy, perfect fit. Can't say enough about how great this product is! I had my new radio up and running flawlessly in about 30 minutes.

Cons: NONE!

2005 Chevy Cobalt PAC Wiring Interface

Vincycle61 from Pennsylvania on 3/15/2015

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

PERFECT FIT, Flawless instructions installation was simple and painless

Pros: PERFECT FIT

Cons: NONE

Great

Eric from Circleville ohio on 2/7/2015

Crutchfield Customer Review (What's this?)

Great fit with no problems at all.

Pros: Everything fit like it should thank you

Cons: None

Nice product

takohio from Ohio on 1/13/2015

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Nice product. easy install. no cutting into the automobile harness. Plus in my GM automobile it keeps the audio head powered up. until the door is opened. Very nice feature if using Bluetooth.

Pros: easy and works

Cons: none

PAC C2R-GM11B Wiring Interface

kaylin from summit ms on 1/10/2015

2007 Pontiac G6
Crutchfield Customer Review (What's this?)

used when installing new radio and this product made it very easy

Pros:

Cons:

Great PAC C2R-GM11B Wiring Interface

JT from Pittsburgh, PA on 10/16/2014

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

I purchased this item along with an aftermarket JVC head unit in order to connect my factory wiring harness to the JVC's. It also retained the car's chimes, and Driver Info Center in my '05 Chevy Cobalt. Installation was smooth using Crutchfield's directions and a little bit of the internet. My only suggestion for first timers like myself is not to get overwhelmed with all of the colored wires. Just wire them up one at a time. Also, test everything before you screw the head unit back in.

Pros: Easy installation

Cons: Slightly pricy, but you can get it for half the price when ordering a head unit.

Adapter

memo from Miami, FL on 7/28/2014

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Easy to install, as it is necessary

Pros: easy to install. easy to switch on/off

Cons: all alerts sound twice. once by the car still and once by the adapter.

Works as advertised

Mark from Oregon on 7/23/2014

2006 Pontiac G6
Crutchfield Customer Review (What's this?)

this let me replace my stock radio with a nice new cd/bluetooth/radio and keep all the chimes. works as advertised

Pros: works

Cons: still have to listen to the chimes....

Made life so easy!!!!

Jarrod K. from Boise, ID on 6/23/2014

Crutchfield Customer Review (What's this?)

This was great. Made it so easy to wire the new stereo!!!

Pros:

Cons:

Works as advertised

A. Rodriguez from Glenside, PA on 5/28/2014

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

The adapter makes it simple to connect the radio to the car. It would probably be almost just as easy to connect the cables directly, as they are all color coded on both sides, but I'm not sure if there are some fuses or on-way gates in the adapter. Turn off the beeping sound if you're installing this on a Chevy Cobalt 2006, it is not necessary (contrary to what the description says, the warning sounds on that car does not come from the stock radio, but from elsewhere in the dashboard).

Pros: Straight-forward.

Cons: Requires splicing a lot of cables, so make sure to get wire connectors/nuts. Very overpriced, the profit margin on this must be of several hundreds percent, but there is no competition, so we are stuck.

Easy-peasy

Anonymous from Rutherfordton, NC on 4/23/2014

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

This made putting my radio in so much faster and it was well worth the money!

Pros:

Cons:

PAC C2R-GM11B Wiring Interface

BRUCE H. from DARLINGTON,PA on 4/1/2014

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

WELL WORTH THE MONEY

Pros: WORKS AS ADVERTISED

Cons: NONE

AWESOME

Amanda from Copenhagen, NY on 2/4/2014

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Awesome!

Pros:

Cons:

Good Wiring Harness

Derrick D. from Haltom City, TX on 1/13/2014

2005 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

This wiring harness was easy to understand and use, even though it turns that this particular wiring harness was probably not strictly necessary for my car. The Crutchfield research said that my car (a 2005 Chevrolet Cobalt LS Coupe) required this harness if I wanted to keep the warning chimes for my car; as it turns out, my warning chimes were not connected to the factory stereo, so I could have bought a much cheaper wiring harness.

Pros: Ease of Use and Installation

Cons: None

PAC C2R-GM11B Factory Integration Adapter

Ron from Elk Grove, CA on 1/10/2014

2005 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

After splicing wires, it's all plug and play. Great product that made installation of new Sony stereo in my daughters 2005 Malibu a breeze while retaining the factory information center functions..

Pros: Very cool kit that fits perfect and everything plugs into the factory plugs for easy integration of new stereo and information center.

Cons: None so far.

Not sure i needed it

Concerned from Allison Park PA on 12/31/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

It kept the key and door functions, but I purchased it for the warning chimes and turn signal sound. Turns out I did not need it for that and had to turn off that function on the adapter.

Pros: Does what it says it will.

Cons: A little misleading on Crutchfield's part, as I did not need it for warning chimes and turn signal sounds.

Adapter Kit

JimL from Brisbin, Pa on 12/26/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Very easy to use.

Pros:

Cons:

PAC C2R-GM11B Wiring Interface

Anonymous from Champaign IL on 12/16/2013

2006 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

Didnt know what i was doing half the time, but it seemed to work!

Pros: Works well

Cons: Instructions were too vague

Perfect integration

Cookie from MA. on 12/7/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Ties the Alpine deck into the cars systems flawlessly.

Pros: Perfect fit

Cons: None

PAC C2R-GM11B

Oclaf from Fonix, AZ on 9/26/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

worked as described. a must have part that works, is easy to install.

Pros: its just what you need. and small enough to not be an issue putting the dash back together

Cons: none i can think of

PAC C2R-GM11B Wiring Interface

Anonymous from fort wayne, in on 9/2/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

It was easy to install and seems to work correctly, EXCEPT for one problem. Sometimes the sound won't work when the car is first turned on, but after cycling the radio on and off, it works. So idk what's causing it.

Pros:

Cons:

Crutchfield response on September 2, 2013 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Awesome unit!

Samuel G. from Daleville, IN on 7/11/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

I love this stereo! Does everything I want and is very affordable.

Pros: Many features and great looking. Also quite easy to install!

Cons: Finish can scratch if you don't use the right kind of wipes on it.

Easy to use

Anonymous from Charlotte NC on 4/2/2013

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

Installed in Chevy Cobalt and made the wiring setup very easy. Painless install.

Pros: Simple easy to use setup

Cons: none

i can hear my chimes in my car now and everything works pefectly

joe from Bristol, CT on 3/11/2013

2006 Pontiac G6
Crutchfield Customer Review (What's this?)

great product and easy to install. everything works great

Pros:

Cons:

Great product

JenDav from Beaufort on 3/4/2013

2006 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

I've had it in my car for about a month now and everything works fine. It retained my cars chimes and was very easy to install.

Pros: It provides an accessory wire so you don't have to tap in for power elsewhere, like the fuse box or ignition

Cons: None

GM integration adaptor works good, but I miss trip mileage

PatrickD from Saint Cloud, MN on 10/12/2012

2005 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

Works great, maintains power when the car is shut off. That being said, I was hoping for some type of way to maintain oil change and trip mileage tracking. Not a huge deal, but I will miss the automated alerts and easy gas mileage calculations.

Pros: Install ease, maintain factory power process

Cons: Loss of mileage computing

If you want a smooth install

MG from Idaho on 8/14/2012

Crutchfield Customer Review (What's this?)

This really made the install easy and I think it is great Crutchfield offers these things at half the price when you buy a stereo from them. Saved a lot of solder and trouble shooting.

Pros:

Cons:

Works Great

Tbay from Ohio on 7/1/2011

2006 Chevrolet Cobalt
Crutchfield Customer Review (What's this?)

I have a 2006 Chevy Cobalt LT with no pioneer system or on star. Just normal Cobalt. This works great with it. One thing to note, I forgot to turn off the chime, if you aren't annoyed with dual chimes, that install it as is, if you don't like chimes, turn it off before installing...just FYI

Pros:

Cons:

PAC C2R-GM11B Wiring Interface

montalvo from St Pete, Fl on 4/26/2010

Crutchfield Customer Review (What's this?)

Does it's job right, and best of all, this is the cheaper version if you don't want to use OnStar.

Pros:

Cons:

Good but too expensive

douglas from Winter Haven, Fl on 10/26/2008

Crutchfield Customer Review (What's this?)

Without it my car wouldnt even start or if it did the gauges would drop so i couldnt do anything. I would give it a 5/5 for the product but its too much. I didnt buy it with my reciever but i would highly reccomend doing it that way to get 50% off.

Pros:

Cons:

Easy enough

Mike from Syracuse, NY on 8/3/2008

Crutchfield Customer Review (What's this?)

I installed this in my wife's 2007 Chevy Malibu Maxx with a new Alpine CDA- 9884. This had to be integrated with the harness for the Metra OEM dash adaptor that has wiring for both the HU and the computer. Had to pull a few pins from the harness included with the PAC and pushed them into the one that came with the Metra, also I had to splice a few lines. A little coordination and it all came together. Functionaly, the car chimes on its own, so I disabled that. Other than that, the unit stays powered when the car is turned off, until the drivers door is opened. Just like its supposed to. Im not sure it was worth the price, but its certianly not a bad thing.

Pros:

Cons:

Details

Hands-on research

Product Research

Features

Overview: The PAC C2R-GM11b GMLAN Warning Chime and Radio Replacement Interface allows easy connection of an aftermarket stereo in select General Motors vehicles without Onstar; 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-GM11b, 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).

Compatibility: The C2R-GM11b Radio Replacement Interface for GMLAN 11-bit vehicles without Onstar is compatible with the following GM vehicles with or without a factory amplifier:

  • Pontiac: 2005-2009 G6
  • Chevrolet: 2005-2006 Cobalt, 2004-2008 Malibu (2008 Malibu Classic only), 2004-2007 Malibu Maxx

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 or the SWI-CP5 steering wheel control interface (sold separately).

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.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Recommended by Crutchfield Tech support rep. [ Fred E.  Aug 19, 2016 ]
Didnt have a choice. My speakers and soe dash lights wont work if i dont have this setup [ Nicholas  Jul 31, 2016 ]
Because it was recomended [ Jack  Apr 15, 2016 ]
Recommended by Crutchfield for my purchase. The wiring harness is always good quality and easy to connect to the vehicles harness for installation. [ Richard  Mar 25, 2016 ]
I installed a new cd player and I needed this in order for it to work [ ozema  Feb 20, 2016 ]
I own an '06 Cobalt Ls with no bells or whistles, but I do have the info center so I ordered this to keep that working. Apparently my model doesn't use the speakers for the warning sounds etc. so I can disable that function on the interface. This is the last part I need to install an after market stereo. [ steven  Feb 17, 2016 ]
Make radio easy to install [ GLENN  Feb 10, 2016 ]
needed to connect radio [ Barney  Jan 11, 2016 ]

4 questions already asked

You can check to see what fits your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Kenny  Jul 04, 2016 ]  Staff
This will depend largely on your vehicle. For details on installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on what you will need for an installation. [ Kenny  Mar 19, 2016 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Jan 27, 2015 ]  Staff
All your stock computer settings will still work. [ JOSHUA  Jan 16, 2015 ]
This adapter does not interfere with the trip on the car. It us just for the auto volume level and the entirety of the speakers in the car. [ JARED A  Jan 16, 2015 ]
Library

Searches related to the PAC C2R-GM11B Wiring Interface Connect a new car stereo and retain safety warning chimes in select 2004-08 Chevrolet and Pontiac vehicles w/o OnStar

PAC