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
|Make ||Model || Year |
| Buick ||Century ||
|Cadillac ||Escalade ||
| Chevrolet ||Avalanche ||
|Express Van ||
|Monte Carlo ||
Silverado/Silverado Classic ||
| GMC ||Canyon ||
|Sierra Classic ||
|Isuzu ||Ascender ||
Hummer ||H2 ||
Oldsmobile ||Alero ||
| Pontiac ||Aztec ||
|Grand Am ||
|Grand Prix ||
|Saturn ||RElay ||
|Saab ||9-7X ||
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.
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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