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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

Item # 249CSGMC2

The Crux CS-GMC2 interface allows you to install an aftermarket radio in select 2000-2013 General Motors vehicles...

Find what Fits your car

The Crux CS-GMC2 interface allows you to install an aftermarket radio in select 2000-2013 General Motors vehicles...

California customers:
Please click here for your Proposition 65 warning.

Item # 249CSGMC2

In stock
$99.99

About the Crux CS-GMC2 Wiring Interface

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.

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.

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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
  • MFR # CS-GMC2

What's in the box:

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

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More details on the Crux CS-GMC2 Wiring Interface

Stacey B.

Product Research

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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Customer Q&A

2 questions already asked

Q
My 2007 Silverado 2500 HD Classic has two connectors in the Bose radio. One is very large, while the other is smaller. This kit only has one very large connector. Do I just not use the second, somewhat smaller connector that is used on the OEM radio? The Metra kits appear to use both (GMOS-014).
[ Dan  Oct 16, 2019 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Oct 23, 2019 ]  Staff
Q
If i had onstar in my vehicle when i bought it but dont use it do i need the steering wheel interface that states with it or without it?
[ james  May 13, 2019 ]
1 answer
A
The ability to retain steering wheel controls with aftermarket receivers will be determined by the receiver you are using and the vehicle you have. For full information on this type of integration (including the parts you will need) please contact an Advisor by phone (1-800-324-9695) or online chat.
[ Krissy  May 21, 2019 ]  Staff

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