OnStar OS-311 - Car audio interface PAC - Free user manual and instructions
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| Product Type | Car Audio Interface |
| Brand | PAC |
| Model | OnStar OS-311 |
| Compatibility | OnStar-equipped GM vehicles (2006-2013) |
| Dimensions (L x W x H) | 2.5 x 1.5 x 0.75 inches (63.5 x 38.1 x 19 mm) |
| Weight | 2.4 oz (68 g) |
| Power Source | Vehicle 12V DC via OBD-II or harness |
| Power Consumption | < 1.5 W |
| Main Functions | Retains OnStar functionality after aftermarket stereo installation; retains chimes, turn-by-turn navigation, and hands-free calling |
| Connections | OBD-II port or vehicle-specific harness; RCA outputs |
| Installation Type | Plug-and-play, no cutting wires |
| Maintenance | Periodic cleaning of connectors with contact cleaner; ensure secure connections |
| Cleaning | Wipe with dry cloth; avoid liquids |
| Safety Warnings | Disconnect vehicle battery before installation; avoid short circuits; use proper fuse rating |
| Spare Parts | Harness adapters, OBD-II cables (available from PAC or authorized dealers) |
| Repairability | No user-serviceable parts; contact PAC support for repairs |
| General Information | Designed to integrate aftermarket radios with factory OnStar system; requires compatible stereo with remote turn-on lead |
Frequently Asked Questions - OnStar OS-311 PAC
What is the PAC OnStar OS-311 used for?
The PAC OnStar OS-311 is a car audio interface that allows you to retain factory OnStar features (chimes, turn-by-turn navigation, hands-free calling) when you replace the factory stereo with an aftermarket unit.
Which vehicles are compatible with the OS-311?
It is designed for GM vehicles equipped with OnStar from model years 2006 to 2013. Check PAC's website or the manual for a specific vehicle list.
How do I install the OS-311?
Installation is plug-and-play. Disconnect the battery, connect the interface between the vehicle's OBD-II port (or harness) and the aftermarket radio, then reconnect the battery. No wire cutting is required.
Does the OS-311 support steering wheel controls?
No, the OS-311 is specifically for retaining OnStar functions. Steering wheel control retention requires a separate adapter (e.g., PAC SWI-RC or similar).
What if my aftermarket radio doesn't work with the OS-311?
Ensure the radio has a remote turn-on lead (12V output) that can trigger the interface. Some radios may need a special harness. Also check compatibility with your vehicle's OnStar generation.
Can I use the OS-311 with a factory amplifier?
The OS-311 does not affect the audio signal path. If your vehicle has a factory amp, you may need a separate adapter to interface with it. The OS-311 only handles OnStar data and chimes.
How do I troubleshoot if OnStar chimes are missing?
Verify all connections are secure. Check that the interface is powered (LED should be lit). Confirm that the aftermarket radio's remote turn-on lead is connected. If issues persist, test the interface in another compatible vehicle.
Is the OS-311 compatible with aftermarket navigation systems?
Yes, as long as the navigation system retains the factory speakers and the OnStar module's audio output is routed through the interface. The OS-311 passes turn-by-turn prompts to the speakers.
Does the OS-311 require programming?
No, it is plug-and-play and does not require any programming. Simply install and it should work automatically with compatible vehicles.
Where can I find the full user manual?
The manual can be downloaded for free from notice-facile.com in PDF format. Search for 'PAC OnStar OS-311' or use the download button on the product page.
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USER MANUAL OnStar OS-311 PAC
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Product information
Brand : PAC
Model : OnStar OS-311
Category : Car audio interface