PAC OS-4 User Manual
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Pacifi c Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705techsupport@pac-audio.com • Voice: 866-931-8021 • Fax: 714-835-3233 • www.pac-audio.com Page 110-06-08The OS-4 is a plug and play interface that allows the replacement of a General Motors GMLAN factory radio. The OS-4 willmaintain operation of the OnStar® system in vehicles with Bose® audio systems, amplified audio systems and also audiosystems without external amplifiers . The OS-4 has on board switching that allow audio from the OnStar® system to playthrough the two front factory speakers. This interface retains all warning chimes, audible turn signal indicators, Bluetoothand the Vehicle Rear Parking Assist System (if equipped). The factory XM radio tuner can be controlled from the Rear SeatEntertainment (RSE) Controls. RSE headphone jacks will also remain active and are designed for use with dual zone radiosand 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 orWithout Factory Amplified Audio SystemsThe Following General Motors Vehicles using the GMLAN Data BusChevy: 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® amplifier3. This interface will work in amplified or non-amplified 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 audiosource 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.J1850J1850 Class 2Class 2VPWVPW Class 2Class 2 J1850J18501 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 0Arbitration EODEOD CRCCRC1 0 0 01 0 0 01 0 0 01 0 0 01 0 0 01 0 0 01 0 0 01 0 0 0 1 11 11 1 1 01 01 01 01 01 0 1 1 11 1 11 1 11 1 1 1 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 01 0 0 1 0 0 1 1 01 01 01 01 0 1 1 01 01 0 000 1 11 1 1 0 1 0 0 0 01 0 1 0 0 0 01 0 1 0 0 0 01 0 1 0 0 0 01 0 1 0 0 0 0 1 1 01 01 0 1 1 01 0 1 11 1 1 0 01 0 0 11 1 01 0 00Class 2Class 2Class 2Class 2Class 2Class 2Class 2Class 2 Class 2Class 2Class 2Class 2Class 2Class 2Class 2Class 2J1850J1850J1850J1850J1850J1850J1850J1850NotesSupported VehiclesInstallationOS-4OS-GMLAN29OS-NAVXM RXM LConnect to SWCInterface. Programfor 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 pinXM Audio output cable into the OS-4. The RCA cables will feed the XM audio into theaftermarket radios AUX input (if available). The XM RCA cables are not necessary forRear 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 amplifierswill determine the 16-pin OS-GMLAN29 connection. If the vehicle has a factory installedamplifier use the Factory Amplifi er Audio location. If a factory installed amplifier is notpresent use the Non-Amplified Factory Audio location.• The OS-NAV connector has VSS, Reverse and Parking Brake outputs as well as theOnStar push button volume adjustment input.• If SWC buttons are present and retained using a radio specifi c SWC interface use theprovided plug. No other connections or splices are necessary.• The CMX retains all factory warning and safety chimes. If the vehicle chimes when theradio is removed the CMX is not needed.• The Mute loop (if not cut) will turn the ACC. output off when an OnStar or Bluetooth callis made or received. If the aftermarket radio has a mute input cut this loop and connectthe outer brown wire to the mute input. Vehicle ConnectionsNavigation ConnectionsSWC InterfaceConnectionsUpgraded Radio Connections |
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