About the PAC OS-311B Wiring Interface
PAC's OS-311B wiring interface lets you replace the factory radio in select 2004-up Chevrolet and Pontiac vehicles, without losing the audible warning tones, turn signal indicators, and OnStar® functions. Warranty: 1 year.
Please enter your vehicle information or call a Sales Advisor at 1-888-955-6000 to find out if this model is compatible with your vehicle.
What's in the box:
- OS-311b GM/OnStar interface
- CM-X chime module
- 6" GM-antenna adapter
- OS-LAN24b OEM adapter harness
- OS-3RAD radio interface harness with in-line relay
- Installation Instructions
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More details on the PAC OS-311B Wiring Interface
Overview: The PAC OS-311b Radio Replacement Interface allows easy connection of an aftermarket stereo in select General Motors vehicles equipped with OnStar; please see "Outfit My Car" to confirm compatibility. The interface will maintain operation of the vehicle's OnStar system and speakers. The OS-311b has on-board switching to allow audio from the OnStar system to play through the two front speakers when OnStar is active. This interface also retains all warning chimes and the audible turn signal indicators.
Note: The OS-311b interface does not retain the factory XM receiver. You will lose the XM option when the factory radio is replaced with an aftermarket head unit.
Smart Mute Circuitry: The unit's built-in Smart Mute Circuitry will mute the radio and play OnStar through your vehicle's front speakers.
Steering Wheel Controls: If your vehicle has steering wheel controls (and the aftermarket radio is compatible) they can be integrated, including the OnStar control, using the optional PAC SWI-RC steering wheel control interface.
RAP System Compatible: The interface supplies your new radio with a 12 volt switched power, and allows your aftermarket radio to operate with your vehicle's RAP (Retained Accessory Power) system. The radio will stay on after the key is turned off and stays on for approximately 10 minutes or until the drivers door is opened.
- OS-311b Interface:
- Width: 6.712" (with cables)
- Height: 1.075"
- Depth: 2.026"
- CM-X Chime Module:
- Width: 2.144" (with cables)
- Height: 1.037"
- Depth: 1.534"
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