GM Radio Replacement C2RGM24

GM Chime & Data-Bus Interface  C2R-GM24
GM Radio replacement interface for 2001-2007 GM vehicles SUV's and trucks. Retains warning chimes when replacing factory Radio, This interface allows you to Retains all warning chimes including back-up chimes, memory seats, low fuel, door/hatch ajar and others, Provides a +12volt accessory wire.  Retains RAP (Retained Accessory Power) when key is turned off.Radio stays on until the door is opened or for approximately 10 minutes.   Supplied wire harness to connect aftermarket stereo to factory speakers.Will work in vehicle that have the factory Bose amplifier removed or bypassed. Custom wiring is required.Buzzer is built into the interface. If the Bose® amplifier is not used bypassed, you can use the C2R-GM24 to retain the warning chimes. Please scroll down to read more information, and the reason why not to replace the GM radio with a simple harness
 

Vehicle application:

2004-2005   Buick Century
2005-2007   Buick Lacrosse
2004-2007   Buick Rainier
2003-2007   Buick Rendezvous
2005-2007   Buick Terraza

2001-2005   Buick Lesabre


2003-2006   Cadillac Escalade
2003-2006   Cadillac Avalanche


2000-2006   Chevrolet Cavalier    non Bose system
2004-2011   Chevrolet Colorado
2005-2013   Chevrolet Corvette
2004-2007   Chevrolet Express
2000-2005   Chevrolet Impala  non Bose system
2001-2003   Chevrolet Malibu
2000-2005   Chevrolet Monte carlo
2003-2004   Chevrolet S 10
2003-2006   Chevrolet Silverado Sierra
2007           Chevrolet Silverado Sierra Classic
2003-2006   Chevrolet SSR
2003-2006   Chevrolet Suburban
2003-2006   Chevrolet Tahoe
2002-2009   Chevrolet Trailblazer non Bose system
2005-2008   Chevrolet Uplander
2003-2005   Chevrolet Venture
2004-2011   Chevrolet Canyon
2002-2009   Chevrolet Envoy
2003-2007   Chevrolet Savana
2003-2006   Chevrolet Yukon


2003-2007   Hummer H2
2005-2009   Hummer H3


2003-2008   Isuzu Azcender


2001-2004   Oldsmobile Alero
2002-2004   Oldsmobile Bravada
2004-2004   Oldsmobile Silhouette


2001-2005   Pontiac Aztec
2001-2005   Pontiac Grand Am
2004-2008   Pontiac Grand Prix
2000-2006   Pontiac Montana
2000-2006   Pontiac Sunfire


2005-2008   Saab 9-7x
2007           Saturn Relay



and many more vehicles with RDS radio

What is Class 2 databus GM radio ?
The Class 2 system is a Serial Data Link used by GM in its vehicles, and is based on the SAE J1850 protocol, which is widely used in the U.S. It is through this data link that the body control module (or BCM) receives information and commands that are essential in determining its mode of operation.The BCM is connected, through Class 2 wiring, to the instrument panel cluster (IPC), the powertrain control module (PCM), the data link connector (DLC) and the radio. Recently GM has now included the driver’s door module, passenger’s door module, rear seat audio controller, vehicle communication interface module or OnStar®, steering wheel audio controls, rear seat entertainment (RSE), CD changer, radio, DVD/Video, amplifier and XM radio as part of Class II. Since these new modules are part of the audio system and security system, you are now hearing more about Class II. Connected to this same data wire is the Body Control Module (BCM), Power train Control Module (PCM), Transfer Case Shift Control Module, Heater & A/C controls (HVAC), Inflatable Restraint Sensing and Diagnostic Module, Theft Deterrent Control Module, Memory Seat Module, Drivers Information Center (DIC), Key Lights Seat belt Chimes (most vehicles), Instrument Panel Cluster (IPC), Suspension Control Module, Electronic Brake Control Module (EBCM) and other modules.
Affects of removing Class 2 radio from your vehicle  2000 and up
( Most Cavaliers, Sunfires and other base models do not offer most, if any of these features.
Check the vehicle owner’s manual to see available features. )
Displays current settings
Oil life monitor reset
Tire inflation monitor reset
Delayed headlamp illumination
Automatic door lock and unlock
Remote visual/audible verification of remote lock/unlock
Enable/Disable content theft
Enable/Disable trunk lock shock sensor
Short or long horn with remote lock/unlock
Key fob transmitter programming
The radio is used as a control panel to communicate with the vehicles computer for the customization of certain “convenience features”. All features work and remain at current settings with the factory radio removed, but can only be customized and/or reset by an authorized service center. More important than the above features and chime, there is no switched 12 volt. power supplied in the radios plug, so it will need to be sourced somewhere else such as the factory fuse panel. A 10A to 30A fused accessory power source is recommended. Depending on the vehicle there are several choices in the factory fuse panel, such as the sunroof or windshield wipers.