Owner's Manual

Pacific Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
[e-mail] • Voice: 714-835-3022 • Fax: [phone] • www.pac-audio.com
Page
1
5/30/06
The OS2-GM32 is a plug and play interface that allows replacement of a General Motors Class II factory stereo. It will maintain
operation of the OnStar® system, Bose® amplifier and speakers. The OS2-GM32 has on board switching to allow audio from
the OnStar® system to play through the two front factory speakers when OnStar® is active.
Retains warning chimes and steering
wheel controls for Onstar®. Use PAC’s line of SWI interfaces for using the steering wheel controls to operate the new stereo. Also retains
Vehicle Parking Assist chimes.
• Safe & Sound Class II circuitry will not disable vehicle data bus even if interface loses power.
• OnStar® active LED and Ignition on LED
• Provides +12v switched accessory output. No more searching for switched +12v in fuse box or kick panel.
• Smart Sense Mute output to either mute the aftermarket radio or to turn if off when OnStar® is active.
• OnStar® Volume control via factory steering wheel audio controls. Radio controls can be retained using an SWI interfaces to control the new radio.
• New radio will operate with the vehicle RAP (Retained Accessory Power) system. The radio stays on after the key is turned off and stays on for approximately
10 minutes or until a door is opened.
Note:
1. The OS2-GM32 does not retain the factory XM receiver, you will lose this option when the factory radio is replaced with an aftermarket
radio.
2. You may use this interface even if the vehicle does not have OnStar® but need to interface the factory amplifier.
Note: New vehicles are constantly being researched. If your vehicle is not listed above, check our website for any new
updates or instructions.
OS2-GM32 rev. 1.1.5
General Motors Class II OnStar
®
and Bose
®
Interface
Installation Instructions.
Factory pin wire harness
General Motors Class II OnStar® Interface
Factory Radio Replacement
Retention of Bose® Amplifier and OnStar® Option
Pacific Accessory Corporation • Santa Ana, CA 92705
Ignition
On LED
OnStar®
Active
RAD-OS2
102.7 FM
Aftermarket stereo
30
85
86
87
87a
Red wire to accessory
input of radio
Cut brown wire at pin #16 and connect
it to mute input wire of radio
Rear outputs
not used
32
OS-GM32
Premium Bose®: Connecting the OS2-GM32 to the vehicle’s Bose® amplifier.
Note: Due to the design of the Premium Bose® system, there is currently no way of fading from front to rear with an aftermarket radio.
Step 1.
Pre wire the RAD-OS2 wire harness to the aftermarket stereo wire harness. If the aftermarket stereo has a mute wire, cut
the brown wire as close as possible to pin #16 of the RAD-OS2 and connect this mute output wire to the stereo’s mute wire.
The rear outputs are not used for this application. The amp remote wire (blu/wht) must be connected to the stereo’s remote
wire.
Step 2.
After connecting the RAD-OS2 and OS-GM32 wire harness to the OS2-GM32 main interface, connect the OS-GM32 con-
nector to the factory harness.
2000-2005 Deville and Seville including DTS. All with or without Bose® amplifier.
2000-2002 Eldorado, with or without Bose® amplifier.