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Crux CS-GMC2 Wiring Interface

Connect a new car stereo and retain steering wheel controls and factory amp in select 2000-2013 GM-made vehicles

63 Reviews

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Overview

Our take on the Crux CS-GMC2 Wiring Interface

The Crux CS-GMC2 interface allows you to install an aftermarket radio in select 2000-2013 General Motors vehicles while retaining your warning chimes. The interface works in GM vehicles with or without a factory amplifier. If you're installing a Pioneer, Sony, Alpine, Clarion, Kenwood, or JVC car stereo, you'll retain the use of your steering wheel audio controls.

Install a new radio and keep your factory features

The Crux CS-GMC2 interface allows you to install an aftermarket radio in select 2000-2013 General Motors vehicles while retaining your warning chimes. The interface works in GM vehicles with or without a factory amplifier. If you're installing a Pioneer, Sony, Alpine, Clarion, Kenwood, or JVC car stereo, you'll retain the use of your steering wheel audio controls.

Many General Motors vehicles don't have a 12-volt accessory wire in their wiring harness, but this interface supplies that wire. The system includes the control module and vehicle and steering wheel control harnesses.

Important Note: You will not retain fader control in the GM Bose Y-91 premium system. This interface does not retain the factory OnStar system in vehicles so equipped.

Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if the CS-GMC2 is compatible with your vehicle. Warranty: 1 year.

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.

Product Highlights:

  • connect a new stereo in select 2000-2013 GM-made models
  • retain your steering wheel audio controls with select car stereos
  • works with factory amplified or non-amplified systems
  • retains GM warning chimes
  • provides a 12-volt accessory wire (missing from factory harness)
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Radio replacement interface
  • Wiring harness
  • 2 SWC harnesses
  • Boss radio SWC adapter
  • Installation Instructions

Really made it easy to install while still being able to use the steering wheel control

Tracy, Braidwood, IL

Reviews

Crux CS-GMC2 Wiring Interface Reviews

Average Customer Review(s):

(63 Reviews)

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Belle Rive, IL on 2/21/2019

2005 GMC Sierra 2500/3500
Crutchfield Customer Review (What's this?)

Installed in a 05 Sierra w/o Onstar or Bose. Works as advertised, steering wheel controls work great. Easy plug and play.

Pros: Simple installation

Cons: The aux plug that ties it to the radio doesn't have a tight fit, be careful to ensure it stays plugged in when installing the head unit.

Crux CS-GMC2 Wiring Interface

Dino from Denton, TX on 2/11/2019

Crutchfield Customer Review (What's this?)

Crutchfield has got the car audio system down so that even the ones of us without much experience can do a professional job. The wiring interface was assembled and set up to where all I had to do was pug it in. I had a couple of technical questions because I had two factory connectors left over with no place to connect. I called Crutchfield's technical support and immediately a technician was on the line with me while I was sitting in my car. He told me sometimes you do have left over connectors that the new receiver has everything I would need. It was like having an expert there with me for the install.

Pros: Easy installation, quality product and fit right with factory harness.

Cons: None

The way to go unless you absolutely need OnStar

Kyle from Katy, TX on 2/9/2019

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

Installed a Sony WX-920BT into a 2006 Avalanche with factory Bose. The interface module is small enough to fit nicely with some foam between the HVAC controls and dash, wiring is neatly done and not a rat's nest like some other interfaces. The wiring is really thin though, barely passes for 18 gauge even with the power/ground wires. The chime sounds decent actually and can be turned completely off through the volume adjustment. Gain isn't adjustable for the Bose amp, but it's about spot on for my new Sony receiver. Steering wheel controls function reliably, although the volume doesn't change as fast when holding the button down as it did with the factory radio, and the Voice/Prog buttons no longer function. I've already gotten used to the volume speed and I never used the other two buttons, so I'm not upset by it, but it's worth mentioning. I also noticed the dimmer output doesn't always work if the auto headlights are already on when you start the truck. Adjusting the dimmer knob a bit makes it function normally again. Other than those quirks, the interface works great. Haven't noticed any weird glitches with the truck, communication errors, battery draw, etc.

Pros: Most reliable and least cumbersome Class 2 interface I've tried

Cons: Thin wiring, Prog and Voice steering wheel controls don't function, some other quirks

Crux CS-GMC2 Wiring Interface

Tracy from Braidwood, IL on 1/2/2019

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

Really made it easy to install while still being able to use the steering wheel control

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Elkhart, IN on 12/26/2018

2004 Buick Rendezvous
Crutchfield Customer Review (What's this?)

Wires stripped ready to go, easy to follow instructions. Very happy with it.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Minnetonka, MN on 12/10/2018

2006 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Works as it should worth the extra to have them pre wire it for your vehicle

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Cons:

Crux CS-GMC2 Wiring Interface

Tim from Turlock, CA on 11/11/2018

2004 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

This made installing an aftermarket stereo in my truck a breeze. Able to keep my steering wheel control of teh sound system

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Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Canton, KS on 10/14/2018

2004 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Works perfectly

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

William from San Antonio, TX on 9/25/2018

2004 Chevrolet Impala
Crutchfield Customer Review (What's this?)

Works Great. Just what I needed...

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Cons:

Crux CS-GMC2 Wiring Interface

David from Warren, NH on 9/20/2018

2005 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Works as the documentation lists. 2005 Silverado 2500HD with Kenwood BT522HD and UK3 steering wheel controls. Steering wheel buttons work and the chimes are retained.

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Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Thurmont, MD on 8/26/2018

2006 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Product was great and easy to install just plug and play.

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Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Buffalo, NY on 7/11/2018

2003 Chevrolet Suburban
Crutchfield Customer Review (What's this?)

Excellent product easy install plug in

Pros:

Cons:

Simple connection

Gregg from Whitwell, TN on 6/19/2018

2006 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Extremely simple to connect wires. Easy plug and play. Works flawlessly.

Pros: Easy to use, easy to connect.

Cons:

Crux CS-GMC2 Wiring Interface

TL from Indianapolis, IN on 5/13/2018

2006 Buick Rainier
Crutchfield Customer Review (What's this?)

Good kit.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Tom from Austin, MN on 5/3/2018

2005 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Great product easy to wire

Pros: Easy to wire

Cons: None

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Liberty Townshi, OH on 5/2/2018

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

Worked well in a C6 Corvette, not having to cut any of the factory wiring is a plus!

Pros: Plug and Play

Cons: Some of the instructions could have been a little clearer, like the fact that one of the plugs that was used for the factory radio, is not used at all, that is not explained.

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Magnolia, AR on 4/24/2018

2003 Chevrolet Avalanche
Crutchfield Customer Review (What's this?)

The interface is well made and everything fit together easily as expected. I gave it a 4 instead of five because I can't use my steering wheel controls to change to the different source like I could with original stereo. It might be a function of the stereo and not the harness but I did pay extra "to maintain steering wheel controls" and if they weren't totally the same it should say so. Overall very pleased though

Pros:

Cons:

Steering Wheel Controls Do Not Function Properly

Jimmy from Destin, FL on 4/15/2018

2006 Buick LaCrosse
Crutchfield Customer Review (What's this?)

This review is focused on the Steering Wheel Control (SWC) features of this interface device. I had no problems with the wiring--radio connections have become common practice because, thankfully, radio manufacturers and connector companies have agreed to a common color code. Only question I had regarding wiring was "Reverse" in the instructions--Crutchfield adviser informed me this was included for a Back-Up camera (if the radio had a display for this)--I guess Reverse is a signal from the vehicle to the radio to display the back-up camera. Now for the review of the logical interface between the radio and the factory SWC: Some of the controls worked without a hitch--volume up/volume down. However, many of the SWC functions did no operate as the instructions indicated. My vehicle (2006 Buick LaCrosse) came equipped with SWC for the climate control system with Temperature Up and Temperature Down steering wheel selections. After installing the CS-GMC2 interface box, the climate controls now do the following: Temp Up - Mode; Temp Down - Volume Attenuation (not Muting only about 3 db attenuation). The steering wheel Mode control doesn't control the Mode; the SWC Mute does nothing; the SWC 1-6 does nothing. After two calls to Crutchfield, I was sent a replacement CS-GMC2. Upon installing the replacement there was no change in the SWC functionality. At this point, I have accepted that this interface does not function as it should and I will just have to live with it.

Pros: Connections should have been easy (three DIP switches and two different connectors designed for different radio manufacturers); however, the results did not live up to the promise.

Cons: This CS-GMC2 did not provide the proper radio operation with the factory Steering Wheel Controls. Mode, Mute, 1-6 did not function as intended or described in the instructions. Also, this interface did not allow the factory climate SWC to control cabin temperature--the Temp Controls now modify the radio settings. I would have preferred the older SWC systems that provided resistors of varying Ohms that I could use for the SWCs to work right.

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Chicago, IL on 4/13/2018

2013 Chevrolet Cruze
Crutchfield Customer Review (What's this?)

Product is great like always! I've been buying from u guys since I was in my late teens and I'm 44 now. Now my son who is 19 got to see first hand how good u guys are. By the way this product is for his first vehicle so I'm sure u gained a new customer for the future. Good job guys, keep doing what you're doing!

Pros:

Cons:

Easy to use

Crutchfield customer from Richwood, OH on 4/3/2018

2006 GMC Sierra 2500/3500
Crutchfield Customer Review (What's this?)

Easy to use. Was able to conceal it easily. Wires up easily. Kept my steering wheel controls and warning chimes as advertised. I like the adjustable volume control for the warning chimes. Would buy again

Pros: Makes everything work as it should

Cons: None

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Saint Peters, MO on 4/2/2018

2002 Chevrolet Cavalier
Crutchfield Customer Review (What's this?)

Easy to install and works/sounds great! highly recommend

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Cons:

Crux CS-GMC2 Wiring Interface

Cory from Lakota, ND on 3/30/2018

2005 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Works good. Plenty of room in the dash to conceal this.

Pros: Easy install

Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Savannah, GA on 3/30/2018

2003 Chevrolet Monte Carlo
Crutchfield Customer Review (What's this?)

Easy to install and works great.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Dave from Owego, NY on 3/27/2018

2006 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Awesome, purchased as part of the preconnected wiring harness option for my 2006 CHevy Silverado 1500HR. It was plug and play utilizing the factory steering wheel controls!

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Crux CS-GMC2 Wiring Interface

Lonnell from Newton, IA on 3/23/2018

2003 Chevrolet Impala
Crutchfield Customer Review (What's this?)

Awesome product

Pros:

Cons:

EASY

Robert from Hartley, IA on 3/18/2018

2005 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great product, easy to install, plug and play. Steering wheel controls work great. Make sure DIP switches are in the right position.

Pros: Easy to use, plug and play

Cons: DIP switches were not set for vehicle.

Crux CS-GMC2 Wiring Interface

Joshua Shane from Fayetteville, NC on 3/16/2018

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

Made it super easy to install my new radio with original wiring.

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Crux CS-GMC2 Wiring Interface

Crutchfield customer from Centerburg, OH on 3/2/2018

Crutchfield Customer Review (What's this?)

Was easy to install and works great

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Cons:

Great...everything works on my GMC Sierra!

Northpotdiver from North Port, FL on 2/25/2018

2006 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Not wanting to loose any factory options on my GMC Sierra, I purchased this interface PRE-WIRED on the GM harness. BEST decision I ever made! Plug it in....PLAY...and NO worries!

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Cons:

Crux CS-GMC2 Wiring Interface

Tim from Florence, MS on 2/23/2018

2006 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Great product easy to install and worked perfectly.

Pros: Easy to install.

Cons:

Crux CS-GMC2 Wiring Interface

Jack from Picayune, MS on 2/19/2018

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

Excellent

Pros:

Cons: none

Crux CS-GMC2 Wiring Interface

Harold from Magnolia, TX on 2/6/2018

2006 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Easy to install instructions were easy to understand and the product worked out great for install.

Pros: great instructions, works great for my needs.

Cons:

Crux CS-GMC2 Wiring Interface

Kent from Wilder, ID on 1/25/2018

2006 GMC Sierra 2500/3500
Crutchfield Customer Review (What's this?)

Installation with the included instructions was straight forward. Works fine with no issues.

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Crux CS-GMC2 Wiring Interface

Crutchfield customer from Rogers, AR on 1/24/2018

2004 Chevrolet Avalanche
Crutchfield Customer Review (What's this?)

Very easy to install. Interface with SWC works great.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Durango, CO on 1/20/2018

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

Your staff has been very helpful with trying to figure out this complex stereo transfer with the Bose system in my suburban. The Bose system has been very problematic to deal with.,and I would never buy a Bose product because of this. I'm still trying to get the new system installed a phase at a time and hope to eventually get it completed. The harness module worked only in the non-Bose input. And the car rear speakers only worked with the entire Bose system in place. I need to fine where to now put the Bose amp ,rear seat module and the massive wire harness, hopefully somewhere in the dash. That being said , again thanks for your help.

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Crux CS-GMC2 Wiring Interface

kevin from Somerville, TN on 1/12/2018

2004 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Works great

Pros:

Cons:

Simple

Kevin from Arkansas City, KS on 1/11/2018

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

This made the install of my pioneer head unit a snap.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Quinton from NY on 1/5/2018

2004 Chevrolet Impala
Crutchfield Customer Review (What's this?)

Works well enough bit of a pain installing

Pros: Does what it is supposed to

Cons: Instructions could stand to be a little better trial and error seems to be the rule

Crux CS-GMC2 Wiring Interface

Clemon from Warner Robins, GA on 1/5/2018

2003 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Product worked as described. Kept door chimes and steering wheel controls.

Pros:

Cons:

Wrong Harness, no amp plug

Tommie from Richmond, VA on 1/5/2018

2003 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

It was not actually the right wiring harness for my truck, no wiring for the amp. I had to go to a big box retailer and get an additional piece to be able to use the amp.

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Crux CS-GMC2 Wiring Interface

Charlie from De Soto, MO on 1/3/2018

2004 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Everything went together as it should have. Stereo sounds great

Pros: Wires matched up well

Cons: One wire for the amp confused me but that's was on me. I thought it was for power antenna

Defective part = more install money and no radio for 6 days

Greg from Centerton, AR on 12/29/2017

2005 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Got on the waiting list for a professional install and found out afterwards that the device was bad. Had to wait for a replacement to be sent to me, reschedule an appointment with the shop and pay extra for their troubles. I gave it an extra star only because Crutchfield did all they could do by replacing it as soon as possible.

Pros: They sent me a new one 5 days later

Cons: No tunes.

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Great Falls, MT on 12/21/2017

2004 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Junk !!! Not all steering wheel controls work !! No speed pulse !! Has a mind of its own !! Only down to the whole deal!!!!! Will be switching out and sending it back after talking to our best stereo installation store in town.

Pros:

Cons:

Easy Peasy.....

Frank from Frederick, MD on 12/15/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Clear instructions, easy hook ups, made it an easy one hour job. I did take the time to pre wire the plug before going outside. Truly plug and play.

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Crux CS-GMC2 Wiring Interface

Crutchfield customer from Avondale, AZ on 12/9/2017

2003 Chevrolet Monte Carlo
Crutchfield Customer Review (What's this?)

Great product and great company to buy from

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Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Denver, CO on 11/27/2017

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

Worked just fine out of the box. All the controls that it stated would work, do. Glad I paid the extra to have the harness put together.

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Cons:

Crux CS-GMC2 Wiring Interface

Chad from Mindoro, WI on 11/4/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great product. Easy to connect and works flawlessly. I retained all steering wheel functions.

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Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Tulsa, OK on 10/31/2017

2005 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Factory controls work perfect!

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Owatonna, MN on 10/31/2017

2003 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

It worked awesome, but it sings when ur door is open and I don't really want to hear it from this little box when my truck already makes that noise on it's own. I wish I could turn that noise off.

Pros: Works awesome

Cons: Dings

Crux CS-GMC2 Wiring Interface

Dan from Baraboo, WI on 10/1/2017

Crutchfield Customer Review (What's this?)

Did exactly what it was supposed to. Retains factory chimes, connecting to the aftermarket head unit was a breeze. Pairing with the head unit couldn't have been easier

Pros: Easy to install

Cons: None so far

Crux CS-GMC2 Wiring Interface

Crutchfield customer from St. Joseph, MO on 9/19/2017

2007 Chevrolet Corvette
Crutchfield Customer Review (What's this?)

This product itself is likely great, but this did not work like I would have liked with my 2007 corvette. The factory chimes did not work like they should have. Each time I would go to change the display on my SIC, there should have only been 1 chime and with this, there were many chimes each time like if you were to pull the e brake.

Pros:

Cons:

Works great

Nick from Sacramento, Ca on 9/12/2017

2004 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great product. No issues with installation. It's nice to be able to keep the steering wheel controls when upgrading to a new stereo.

Pros: Easy to connect.

Cons: None

Good deal

Matt from Robertsdale AL on 8/23/2017

2005 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Working fine, once tech support helped me sort through it.

Pros: Works as advertised

Cons: May take more than one attempt

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Columbus, OH on 8/7/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Works well on my 06 Silverado

Pros:

Cons:

Replacement

Douglas from Waterloo, IA on 8/1/2017

Crutchfield Customer Review (What's this?)

Crux CS-GMC2 Wiring Interface This was a replacement for another model. Much easier to install and works 10x better, steering wheel controls work faster Thanks for all the help

Pros:

Cons: None at this time

Crux CS-GMC2 Wiring Interface

Rich from Arlington, TX on 7/30/2017

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

System works well, retained all the factory features I use, Thank you

Pros: Works well, some hard wiring needed but is straight forward

Cons: None

Crux CS-GMC2 Wiring Interface

Crutchfield customer from Ft Dodge, IA on 7/8/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Easy to wire up.Everything on the steering wheel works.The questions I had were answered by tech support.

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

lloyd from Moselle Ms on 7/3/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Work good and customer service and technology support

Pros:

Cons:

Bad recommendation for AVIC-5200-NEX

Dave from Seattle, WA on 6/26/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

After professional installation got error message "Speed Pulse Wire Not Connected". I purchase the Crux interface at Crutchfield recommendation. It turns out the Crux interface does not include a speed pulse wire. WHY DOES CRUTCHFIELD RECOMMEND AN INCOMPLETE INTERFACE? Crutchfield customer service was a disappointment. The first response from Daniel was ... Hello Dave, If the Crux was not capable of picking up the speed sense he could have ran it to the actual wire in vehicle. Vehicle speed sense: Pin E6 of 68-pin gray plug behind LH instrument panel relay block under dash D.GN/WT. The speed sense wire is optional and "Hybrid" mode means it obtains yours speed via GPS instead of tach wire. If you want him to connect this and he cannot find it he can call us with your order number. Thanks, CRUTCHFIELD Daniel, Technical Support The second response from AJ... Hello, Our web description on the Crux does list all features retained and we do not list the speed sense wire, but it's honestly not something most people consider or know they need up front. We'd be happy to set up a return for the Crux or an exchange if you'd prefer to use the Metra the dealer recommends. We do list the LC-GMRC-01 which has a VSS (vehicle speed sense) output. Just let us know how you'd like to proceed, we can get you return information if you'd like to send the Crux back. AJ NO APOLOGY. NO OFFER TO PAY FOR ADDITI

Pros:

Cons: Does not include "Speed Pulse Wire" Steering wheel "Program" button only toggles in one direction.

Crutchfield response on 7/13/2017 Dave, we are sorry that you didn't get an apology. The Tech Support responses you posted show that our Tech gurus were willing to help the professional installer directly, as well as issue a refund if needed. One of our Tech Supervisors, Cecil, also took a look at this interaction. He confirmed that the VSS, or speed pulse wire, is often not used by many receiver manufacturers. The fact it wasn't present wasn't that surprising. These receivers get their information by using a "hybrid" mode that uses GPS to track speed.

restores factory steering wheel controls

Michael from Fremont, CA on 6/12/2017

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

The kit works great! I had a couple of problems while installing the kit making the factory steering wheel controls functional. First, you have to plug in the RCA jack into the back of the radio and the other side to the interface. the direction says that you use this cable for a wired remote. I did not know that this was the cable that makes the steering wheel controls function with the radio. Second, you have to select a couple of switches according to what radio you are installing. The directions said for my application turn switch one on and the rest off. The controls did not work. When I changed the switches to switch one off and the rest to on, the factory steering wheel controls functioned properly.

Pros: restores factory steering wheel controls

Cons: Parts of the directions were not cl ear.

Crux CS-GMC2 Wiring Interface

Randy from MI on 6/4/2017

1999 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

Keep the factory steering wheel controls?! Absolutely! I love this capability!

Pros:

Cons:

Crux CS-GMC2 Wiring Interface

Hector from Christopher IL on 5/15/2017

2005 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great product easy install and directions I highly recommend this

Pros: Everything

Cons: None

Crux CS-GMC2 Wiring Interface

Jeffrey Ten from San Mateo, CA on 5/12/2017

2004 Chevrolet Impala
Crutchfield Customer Review (What's this?)

Easy instructions and I like that you can customize how loud the beeping is

Pros:

Cons:

Details

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Features

Radio Replacement Interface: The CRUX CS-GMC2 is a radio replacement interface for select GM Class II dataBus vehicles. It facilitates the integration of an aftermarket radio and enables retention of factory features when replacing a factory installed radio in select GM vehicles (with or without factory-installed amps). This interface is also pre-programmed for retention of steering wheel controls.

Note: This interface does not retain the vehicle's factory OnStar, if equipped.

Vehicle Compatibility: The CRUX CS-GMC2 radio replacement interface works with the following 2000-2013 GM Class II dataBus vehicles (as of 2/9/2017):

Make Model Year
Buick Century 2004-2005
LaCrosse 2005-2007
Rainier 2004-2007
Rendezvous 2003-2005
Terraza 2005-2007
Cadillac Escalade 2003-2006
Chevrolet Avalanche 2003-2006
Cavalier 2000-2005
Colorado 2004-2013
Corvette 2005-2013
Express Van 2004-2007
Impala 2000-2005
Monte Carlo 2000-2005
S-10 2003-2004
Silverado/Silverado Classic 2003-2007
SSR 2003-2006
Suburban 2003-2006
Tahoe 2003-2006
Trailblazer 2002-2009
Uplander 2005-2008
Venture 2003-2005
GMC Canyon 2004-2011
Envoy 2002-2009
Savana 2003-2007
Sierra Classic 2003-2006
Yukon 2003-2006
Isuzu Ascender 2003-2008
Hummer H2 2003-2007
H3 2005-2009
Oldsmobile Alero 2001-2004
Bravada 2002-2004
Silhouette 2000-2004
Pontiac Aztec 2001-2005
Grand Am 2001-2005
Grand Prix 2004-2008
Montana 2000-2006
Sunfire 2000-2005
Saturn RElay 2005-2007
Saab 9-7X 2005-2008

Amplified or Non-Amplified Systems: The CRUX CS-GMC2 can be used in GM vehicles with or without a factory amplified system. Its compatible with Bose, non-Bose, and Y-91 audio systems.  Front & Rear fading is not retained in vehicles with a factory Y-91 Bose system.

+12V Accessory Output: In many GM vehicles, there is no 12-volt accessory wire in the factory harness, which requires the installer to run an accessory wire to the fuse box or underneath the steering column when installing an aftermarket radio. The CS-GMC2 is designed to provide a 12V/3A switched accessory output (red wire).

Warning Chimes: The Crux CS-GMC2 retains factory warning & safety chimes through the use of an on-board speaker. The volume of the chime speaker is adjustable through a potentiometer on the interface module.

Steering Wheel Control Retention: The CRUX CS-GMC2 also features a steering wheel control output for Pioneer, Sony, Alpine, Clarion, Kenwood, and JVC aftermarket head units. The steering wheel control output consists of a right-angle 3.5mm connector and a light blue/yellow wire (use the connection that your aftermarket head unit is fitted with). The CS-GMC2 interface module will work with any of the listed aftermarket head units, by setting its three dip-switches (see owner's manual for appropriate setting).

Note: There are two steering wheel control harnesses; you will only use one based on the brand of your aftermarket stereo. Both feature a 4-pin connector which plugs into the interface module. One of the SWC harnesses is equipped with a 3.5mm connector and one blue/yellow wire (for Alpine/Clarion/JVC/Kenwood), while the other is only equipped with a 3.5mm connector (for Pioneer/Sony).

Wiring Harness: The included wiring harness has the following bare wire leads which will need to be hardwired to your aftermarket radio's wiring harness or the vehicle's factory wiring.

Wire Color Function
Black Chassis Ground
Red +12 Volt Accessory
Yellow +12 Volt Constant
Orange Illumination
Blue Power Antenna
Blue/White Amp Turn-On
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -
Red/White Reverse Gear

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

retain door chimes and warnings and steering wheel controls [ Michael  Feb 13, 2019 ]
ease of instalation [ Margaret  Dec 31, 2018 ]
Idk [ bryan  Dec 30, 2018 ]
easy [ Ray  Nov 26, 2018 ]
it was the only way to keep my factory amp [ WILLIAM  Sep 12, 2018 ]
Brady from crutchfield via chat recommended it [ Jim  Aug 23, 2018 ]
Needed chimes etc. Advisor says it's compatible with my 2005 Silverado LS 2500HD and my Kenwood KMM-BT522HD [ David  Aug 22, 2018 ]
Wanted to keep steering wheel control [ Rob  Jun 10, 2018 ]
Bought a generic harness off of Ebay and had a terrible time trying to get it installed! This harness will work perfect for me truck. GMC Sierra 1500 SLE. [ Jeremy  May 31, 2018 ]
To retain steering wheel buttons [ LEE  Apr 22, 2018 ]
I chose this for several reasons: 1. Some type of logical interface is required to replace factory radios in GM vehicles built after 2002 for the factory alarms and other factory features to work. 2. This allows the original Steering Wheel Controls to function with my replacement head unit. 3. This unit provides connections to the factory radio connector without my having to cut factory wiring. [ James  Mar 31, 2018 ]
Recommended for the receiver I purchased [ Keelan L.  Mar 19, 2018 ]
Crutchfield recommendation [ Michael  Feb 09, 2018 ]
Needed for install [ James  Jan 17, 2018 ]
So that I could use my stock steering wheel controls [ Jerry Dale  Jan 13, 2018 ]
This was part of the installation kit I needed [ Mark  Jan 04, 2018 ]
Required to make all factory controls work with my new receiver [ Michael  Jan 02, 2018 ]
Definitely wanted to keep steering wheel controls so it was an easy choice to buy this piece . [ Russell  Dec 23, 2017 ]
This really sucks!!! [ John  Nov 20, 2017 ]
I want to keep the audio controls working on my steering wheel. [ FRANCIS  Nov 03, 2017 ]
Recommended for easy install in my truck [ Lincoln  Sep 22, 2017 ]
Making sure everything hooks back up right. [ Phil  Aug 19, 2017 ]
Because it was automatically put in the cart [ Jacob  Jun 17, 2017 ]
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