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PAC OS-1BOSE OnStar Adaptor Radio Replacement Interface Cadillac, Chevrolet, GMC and Pontiac 1998-2002 Vehicles features:
Pacific Accessory Corporation OS-1BOSE OnStar Adaptor LAN Data Bus Radio Replacement Interface with Bose Sound System
Not compatible with vehicles equipped with an RDS radio
Retains OnStar when the factory radio is replaced
Retains all safety warning chimes
Retains Bose amplified audio system
Maintains a healthy status on the Class II databus
Plug-in installation for vehicles with 21-pin harness
The OS-1 BOSE is a plug and play interface kit that allows replacement of a General Motors factory stereo (without RDS option) and maintain operation of the OnStar system and the Bose amplifier and speakers.
The kit includes the OS-1 OnStar interface and the OEM-1 premium sound system interface and cable.
The OS-1 has on board switching, and amplification to allow audio from the OnStar system to play through the two front factory speakers when OnStar is active, and mute the new replacement radio.
The OS-1 can also be used when a stereo and amplifier combination system is installed. Separate speakers can be added if desired.
There are separate gain adjustments for left and right OnStar audio and an LED indicator that turns on when the OS-1 receives an ON command from the OnStar system.
Cadillac Escalade* 1999-2000
Cadillac Escalade 2002
Chevrolet Avalanche 2002
Chevrolet Blazer (S-10) 1999-2001
Chevrolet Silverado 1998-2002
Chevrolet Suburban 1998-2002
Chevrolet Venture 1998-2002
Chevrolet Tahoe 1998-2002
GMC Suburban 1998-2002
GMC Yukon 1998-2002
GMC Yukon Denali 1998-2002
GMC Yukon XL 1998-2002
Pontiac Montana 1998-1999
Pontiac Grand Prix 1998-2003 [with Bose - This interface is not designed for this vehicle, however, you can order the AMP-GM21B (1998-1999 Grand Prix) or AMP-GM21C (2000-2003 Grand Prix) harness to replace the AMP-GM21A harness to make this interface work correctly]
The OS-1 will interface with all GM radios that use the 21 pin/9 pin connectors. If there is a RDS logo on the radio face or the radio uses the 24 pin/12 pin connectors, this interface will not work.
*WARNING! (Vehicles equipped with a 9 pin Y connector) Do not unplug the separate 9 pin female and male connectors that are located farther back in the dash. Doing so will disconnect OnStar from the OS-GM9 connector.
*Remember to reset OnStar by turning the ignition off for at least two minutes prior to testing.
*The AMP-GM21A wire harness will ONLY work on a vehicle with a BOSE premium sound system.
What do all of the wire colors mean? Aftermarket manufacturers have made car stereo receiver installation an easier process by using a standardized wire color scheme. We walk you through what each individual wire does, this way if you have an installation that doesn't perform properly you will have the resources to begin troubleshooting your installation.
