Pac-Audio GM1A-RST Radio Replacement Interface Module for Select 2000-

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The GM1A-RST interface allows the replacement of a factory radio in select General Motors vehicles with the Class II Data-Bus. Using this interface will retain factory features such as Warning Chimes, Bose Amplifier, Steering Wheel Controls (SWC), Rear Seat Entertainment (RSE), and Rear Seat Controls (RSC) when the original radio is removed.

The GM1A-RST provides data bus driven outputs such as retained accessory power (RAP), vehicle speed signal (VSS), illumination, reverse trigger and parking brake. You can also add multiple camera inputs to your aftermarket radio with Data-Bus controlled automatic activation (front camera only) by connecting a VS41 into the expansion port on the GM1A-RST.

Important Notes

The included chime speaker should only be used if you are connecting an aftermarket amplifier to the cabin speakers.
Aftermarket radio must have an auxiliary input in order to retain RSE audio.
In vehicles with Premium Bose (Y91 / UQA) the chime volume can only be adjusted on the module via the adjustment dial. Please refer to page 3 under adjustable settings for further details.
Aftermarket radios with a 2-wire resistive based SWC circuit (Key 1 / Key 2 wires) will not have default button assignments programmed. Please refer to the owners manual of the radio you are installing to find out the proper SWC programming procedure.
When using real time speaker fading (Premium Bose only), if the fader setting is biased more to the front or rear, as the radio turns on the sound may begin at the default setting and then quickly transition to your custom setting.
Aftermarket radio features such as High Pass Filters (crossovers), DSP or “Network Mode” will interfere with proper fader function (Premium Bose only). In order for the GM1A-RST’s fader function to work, the audio from the aftermarket radio’s output must match so it can compare the front and rear audio levels and determine the proper fader setting for the factory amplifier.
When used in conjunction with the add on camera controller (VS41) the GM1A-RST will only provide Data-Bus controlled automatic activation for the front camera. Please refer to the vehicle specific VS41 instructions for more detail.

Year(s)	Make	Model	Compatible feature(s)	Not compatible feature(s)
2004-2005	BUICK	CENTURY	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2007	BUICK	LACROSSE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2004-2007	BUICK	RAINIER	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2007	BUICK	RENDEZVOUS	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2007	BUICK	TERRAZA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CADILLAC	ESCALADE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CADILLAC	ESCALADE ESV	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CADILLAC	ESCALADE EXT	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CHEVROLET	AVALANCHE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2005	CHEVROLET	CAVALIER	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2004-2012	CHEVROLET	COLORADO	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2013	CHEVROLET	CORVETTE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2004-2007	CHEVROLET	EXPRESS VAN	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2005	CHEVROLET	IMPALA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2001-2003	CHEVROLET	MALIBU	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2005	CHEVROLET	MONTE CARLO	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2004	CHEVROLET	S-10 PICKUP	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CHEVROLET	SILVERADO	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2007	CHEVROLET	SILVERADO	Classic model, With OnStar, With Steering Wheel Controls	New model, Without OnStar, Without Steering Wheel Controls
2003-2006	CHEVROLET	SSR	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CHEVROLET	SUBURBAN	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	CHEVROLET	TAHOE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2002-2009	CHEVROLET	TRAILBLAZER	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2008	CHEVROLET	UPLANDER	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2005	CHEVROLET	VENTURE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2004-2011	GMC	CANYON	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2002-2009	GMC	ENVOY	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2007	GMC	SAVANA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	GMC	SIERRA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2007	GMC	SIERRA	Classic model, With OnStar, With Steering Wheel Controls	New model, Without OnStar, Without Steering Wheel Controls
2003-2006	GMC	YUKON	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2006	GMC	YUKON XL	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2007	HUMMER	H2	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2010	HUMMER	H3	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2009-2010	HUMMER	H3T	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2003-2008	ISUZU	ASCENDER	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2001-2004	OLDSMOBILE	ALERO	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2002-2004	OLDSMOBILE	BRAVADA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2004	OLDSMOBILE	SILHOUETTE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2001-2005	PONTIAC	AZTEK	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2001-2005	PONTIAC	GRAND AM	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2004-2008	PONTIAC	GRAND PRIX	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2006	PONTIAC	MONTANA	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2000-2005	PONTIAC	SUNFIRE	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2008	SAAB	R-7X	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls
2005-2007	SATURN	RELAY	With OnStar, With Steering Wheel Controls	Without OnStar, Without Steering Wheel Controls

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