Works on most 2002 + earlier gm vehicles with bose system. Use os1bose
When replacing factory radio with aftermarket radio to retain onstar
Functionality. Comes w/oem-1 premium sound system interface + an os1.
Note: will not work with onstar equiped vehicles that have factory
Radio with rds (those radios will have an "rds" logo on the front face
Of the factory radio).

www.Pac-audio.Com for more information.