PAC OS-4 - User Manual

Pacifi c Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
techsupport@pac-audio.com • Voice: 866-931-8021 • Fax: 714-835-3233 • www.pac-audio.com
Page 1
10-06-08
The OS-4 is a plug and play interface that allows the replacement of a General Motors GMLAN factory radio. The OS-4 will
maintain operation of the OnStar® system in vehicles with Bose® audio systems, amplifi ed audio systems and also audio
systems without external amplifi ers . The OS-4 has on board switching that allow audio from the OnStar® system to play
through the two front factory speakers. This interface retains all warning chimes, audible turn signal indicators, Bluetooth
and the Vehicle Rear Parking Assist System (if equipped). The factory XM radio tuner can be controlled from the Rear Seat
Entertainment (RSE) Controls. RSE headphone jacks will also remain active and are designed for use with dual zone radios
and the factory installed XM tuner. If the overhead LCD is present the IR headphone system will also be active.
General Motors OnStar®
Interface for GMLAN Vehicles With or
Without Factory Amplifi ed Audio Systems
The Following General Motors Vehicles using the GMLAN Data Bus
Chevy: Express (08) Equinox (07-08) Suburban (07-09) Tahoe (07-09) Avalanche (07-09) Monte Carlo (06-07) Silverado - not classic (07-09) Impala (06-09)
Transverse (09)
GMC: Acadia (07-09) Yukon Denali (07-09) Yukon (07-09) Sierra - not classic (07-09)
Cadillac: DTS (06-09) Escalade - including ESV and EXT (07-09) SRX (07-09)
Buick: Enclave (08-09) Lucerne (06-09)
Hummer: H2 (08-09)
Pontiac: Torrent (07-09)
Saturn: Outlook (07-09) Vue (08-09)
Suzuki: XL-7 (07-08)
1. The OS-4 will retain the use of the factory installed XM receiver. Factory RSE Controls must be present for use of this feature.
2. You may use this interface if the vehicle does not have OnStar® but you need to interface with the Bose® amplifi er
3. This interface will work in amplifi ed or non-amplifi ed audio systems.
4. This interface retains the 5.1 audio system in equipped Cadillac vehicles.
5. Built in Smart Mute Circuitry will play OnStar® through the front speakers and allow the RSE audio jacks to continue playing the audio
source selected by the RSE Controls.
• OnStar® active LED and Ignition on LED.
• New radio will operate with the vehicle RAP (Retained Accessory Power) system.
• Provides +12v RAP circuit, Illumination, Vehicle Speed Sensor (VSS) Output, Parking brake, and Reverse trigger outputs.
• OnStar® Volume control via factory steering wheel audio controls or a push-button switch.
• Safety chime audio level is controlled through the Driver Information Center (DIC).
• RSE Controls will play the aftermarket radios dual zone source or the factory XM tuner if serviced.
• Overhead RSE LCD is usable as well as factory IR headphone system and Rear Auxiliary Input Jacks (use PAC Part # GMRVD).
• Steering wheel radio controls can be retained to control new radio by using the SWI-X, ECL2, JACK or PS.
J1850
J1850
Class 2
Class 2
VPW
VPW
Class 2
Class 2
J1850
J1850
1 0 0 0
1 1
1 0
1 1 1
1 0 0 1 0 0
1
1 0
1
1 0
0
1 1
1 0 1 0 0 0 0
1
1 0
1
1 0
1 1
1 0 0
1
1 0
0
Arbitration
EOD
EOD
CRC
CRC
1 0 0 0
1 0 0 0
1 0 0 0
1 0 0 0
1 0 0 0
1 0 0 0
1 0 0 0
1 0 0 0
1 1
1 1
1 1
1 0
1 0
1 0
1 0
1 0
1 0
1 1 1
1 1 1
1 1 1
1 1 1
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1 0 0 1 0 0
1
1 0
1 0
1 0
1 0
1 0
1
1 0
1 0
1 0
0
0
0
1 1
1 1
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1 0 1 0 0 0 0
1
1 0
1 0
1 0
1
1 0
1 0
1 1
1 1
1 0 0
1 0 0
1
1
1 0
1 0
0
0
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
Class 2
J1850
J1850
J1850
J1850
J1850
J1850
J1850
J1850
Notes
Supported Vehicles
Installation
OS-4
OS-GMLAN29
OS-NAV
XM R
XM L
Connect to SWC Interface. Program for Version 2.
OS-RADPWRAUDIO
• Aftermarket radio connections are made at the 20-pin OS-RADPWRAUDIO connector.
A detailed description of these wires is on the next page.
• If the vehicle has Rear Seat Audio Controls and the XM tuner is serviced plug the 8 pin
XM Audio output cable into the OS-4. The RCA cables will feed the XM audio into the
aftermarket radios AUX input (if available). The XM RCA cables are not necessary for
Rear Seat Audio but will allow the headunit to play the XM audio through the cabin.
• Factory installed audio options such as Bose, Harman Kardon or Pioneer amplifi ers
will determine the 16-pin OS-GMLAN29 connection. If the vehicle has a factory installed
amplifi er use the Factory Amplifi er Audio location. If a factory installed amplifi er is not
present use the Non-Amplifi ed Factory Audio location.
• The OS-NAV connector has VSS, Reverse and Parking Brake outputs as well as the
OnStar push button volume adjustment input.
• If SWC buttons are present and retained using a radio specifi c SWC interface use the
provided plug. No other connections or splices are necessary.
• The CMX retains all factory warning and safety chimes. If the vehicle chimes when the
radio is removed the CMX is not needed.
• The Mute loop (if not cut) will turn the ACC. output off when an OnStar or Bluetooth call
is made or received. If the aftermarket radio has a mute input cut this loop and connect
the outer brown wire to the mute input.
Vehicle Connections
Navigation Connections
SWC Interface
Connections
Upgraded Radio Connections

Summary

OS-4 Interface Overview and Features

Core Functionality of OS-4

Explains the OS-4's plug-and-play capability for GM GMLAN factory radios and retention of vehicle features.

Supported Vehicle Models

Lists General Motors vehicles compatible with the OS-4 interface based on GMLAN data bus.

Installation and Connection Guide

Aftermarket Radio Wiring

Details connections made at the 20-pin OS-RADPWRAUDIO connector for aftermarket radios.

Rear Seat Entertainment (RSE) Integration

Connects RSE controls and XM audio to aftermarket radio AUX input for dual-zone or XM audio.

Factory Amplifier Identification

Guides connection based on factory installed amplifier presence or non-amplified audio systems.

SWC and CMX Module Connections

Details connections for Steering Wheel Control (SWC) interface and CMX chime module.

Connecting and Using OnStar Features

SWC Button Operations for OnStar

Explains how to use steering wheel control buttons for OnStar voice recognition and Bluetooth.

OnStar Audio Level Control

Describes how to adjust OnStar or Bluetooth audio levels using SWC buttons or a separate switch.

OnStar;Bluetooth Call Management

Details how to end calls or reject incoming calls during an OnStar or Bluetooth connection.

Advanced Features and Testing

Rear Seat Audio Control Functions

Explains using RSE controls for dual-zone radio source and factory XM tuner.

Factory XM Tuner Operation

Details how to select and control the factory XM tuner via RSE controls.

Installation Notes and Considerations

Provides critical notes for initial interface recognition, wiring, and specific vehicle models.

Testing and Verification Steps

Outlines procedures to test ignition, radio, OnStar activation, and RAP functionality.

PAC OS-4 Specifications

General

Product Type	Radio Replacement Interface
Compatibility	Select GM Vehicles
R.A.P. (Retained Accessory Power)	Yes
Chime Retention	Yes
OnStar Retention	Yes
Amplifier Turn-On	Yes
Navigation Outputs	Yes
Pre-amp Outputs	No