The PAC-OS4 is a plug and play interface that all for the replacement of a GM GMLAN Factory radio. It maintains the operation of OnStar in vehicles with Bose sound systems, amplified audio systems, and also audio systems without an external amplifier. The OS-4 has on-board switching that allows audio from the OnStar system to play through the two front factory speakers. This interface retains all factory warning chimes, audible turn signal indicators, factory XM Radio, and rear parking assist system. This is an all-in-one interface that eliminates the needed for multiple harnesses in specific GM LAN Vehicles.
- Replacement interface for select GM Vehicles with OnStar, Bose, and GM LAN Data Bus
- Compatible with or without factory amplified audio system
- Can be used if the vehicle does not have OnStar
- Compatible with or without Bose systems
- Provides 12 Volt RAP Output wire
- Retains the 5.1 Digital audio system in select GM Vehicles
- Adjustable OnStar volume using the factory steering wheel controls
- Factory XM Retention (vehicles with rear seat controls)
- Retains factory rear park assist sensor system
- Provides a direct plug and play in to any PAC SWI Interface
- Retains factory Bluetooth (features and functions)
- Latest installed version: 1.2.3.8
- 1-year Manufacturer's warranty
- Check the General Installation Manual to see basic instructions for the PAC OS-4
Compatible with the following GM Vehicles:
- Chevrolet:
- 2007 - 2009 Tahoe
- 2007 - 2009 Suburban
- 2007 - 2009 Avalanche
- 2007 - 2009 Silverado (Non-Classic)
- 2006 - 2009 Impala
- 2006 - 2007 Monte Carlo
- 2007 - 2008 Express
- 2007 - 2008 Equinox
- GMC:
- 2007 - 2009 Yukon Denali
- 2007 - 2009 Sierra (Non-Classic)
- 2007 - 2009 Acadia
- Cadillac:
- 2007 - 2009 Escalade / ESV / EXT
- 2007 - 2009 SRX
- 2007 - 2009 DTS
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| (previous model, replaced by PAC OS-4) | |  |
| (previous model, replaced by PAC OS-3) |
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Average Customer Rating is 4.7 out of 5 stars:
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Average Attributes Rating:
| Durability | | 4.9 |
| Value | | 4.9 |
| Features | | 4.9 |
| Design | | 5.0 |
| Usability | | 4.8 |
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Quick Comparison:
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Most Helpful Customer Reviews:
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Review by
Greg from Savannah,Georgia
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Great product works very well. Easy to install in my 2008 Silverado.
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Review by
Jake from Kansas City, MO
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I have a 2011 GMC Sierra and I had to get this product in order to have an aftermarket radio and keep my On Star and chimes and such. Overall great product!
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Review by
Jake from Kansas City, MO
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I have a 2011 GMC Sierra and I had to get this product in order to have an aftermarket radio and keep my On Star and chimes and such. Overall great product!
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Review by
Gary from Stittsville, Ontario, Canada
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I had the PAC OS-4 installed by a professional. Everything worked as advertised, including OnStar. The only small drawback is the turn signal chime is too loud and quite annoying.
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Review by
Rodney from Havelock, NC
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Works well in my wife's Cadillac DTS.
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