FITS THE FOLLOWING VEHICLES: 
BUICK
2004-2005        CENTURY
2005-2007        LACROSSE
2004-2007        RAINIER
2003-2007        RENDEZVOUS
2005-2007        TERRAZA
CADILLAC
2003-2006        ESCALADE
2003-2006        ESCALADE ESV
2003-2006        ESCALADE EXT
CHEVROLET
2003-2006        AVALANCHE
2000-2005        CAVALIER
2004-2013        COLORADO
2005-2013        CORVETTE
2004-2007        EXPRESS VAN
2000-2005        IMPALA
2001-2003        MALIBU
2000-2005        MONTE CARLO
2003-2004        S-10 PICKUP
2003-2006        SILVERADO
2007        SILVERADO    CLASSIC    
2003-2006        SSR
2003-2006        SUBURBAN
2003-2006        TAHOE
2002-2009        TRAILBLAZER
2005-2008        UPLANDER
2003-2005        VENTURE
GMC
2004-2011        CANYON
2002-2009        ENVOY
2003-2007        SAVANA
2003-2006        SIERRA
2007        SIERRA    CLASSIC
2003-2006        YUKON
2003-2006        YUKON XL
HUMMER
2003-2007        H2
2005-2010        H3
2009-2010        H3T
ISUZU
2003-2008        ASCENDER
OLDSMOBILE
2001-2004        ALERO
2002-2004        BRAVADA
2000-2004        SILHOUETTE
PONTIAC
2001-2005        AZTEK
2001-2005        GRAND AM
2004-2008        GRAND PRIX
2000-2006        MONTANA
2000-2005        SUNFIRE
SAAB
2005-2008        9-7X
SATURN
2005-2007        RELAY
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PAC GM1A-RS
RADIO INSTALLATION ADAPTER FOR SLECT GM VEHICLES
GENERAL FEATURES:
PAC GM1A-RS RadioPRO Advanced Radio installation Adapter for GM Class-2 Vehicles. Retains Chimes, Steering wheel controls and factory amplified systems.
RadioPRO Advanced has been engineered to save you time and seamlessly integrate into a vehicle's databus system to retain features such as steering wheel controls, factory amplifier, audio fade, rear-seat entertainment system, and safety notifications.
RadioPRO Advanced features improved sound quality of warning chimes through a provided speaker, and direct USB connection for quick and easy product setting adjustments and firmware updates. It also saves you time on the installation with a streamlined harness design, smaller housing, and easier adjustment of chimes and factory amplifier gain.
KEY FEATURES:
Keeps steering wheel controls
Warning chimes through external speaker
Bose amplifier retention (Standard and Premium)
Audio fade setting through application
Rear-seat entertainment system retention
Time saving streamlined harness design and small housing
USB updatable