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PAC OS-4

Radio Replacement Interface for Select GM Vehicles with OnStar, GM-LAN Data-Bus, and With/Without Bose

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• Radio Replacement Interface for Select GM Vehicles with OnStar, Bose and GM-LAN Data-Bus
• Can Be Used If The Vehicle Does Not Have OnStar
• Retains The 5.1 Digital Audio System In Select GM Vehicles

Learn more about the os4

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

os5 thumbnail

PAC OS-5 Wiring Interface

OUR PRICE: $154.99

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Description


PAC brand icon

Authorized dealer

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.

General Features:

  • 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 version installed
  • 1-year Manufacturer's warranty
  • Check the General Installation Manual to see basic instructions for the PAC OS-4

Compatibility List:

  • 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

Product history:

PAC OS-5 thumbnail
(newest, current model)
PAC OS-4 thumbnail
(previous model, replaced by PAC OS-5 Wiring Interface)
PAC OS-3 thumbnail
(previous model, replaced by PAC OS-4)
iSimple GMAHLAN thumbnail
(previous model, replaced by PAC OS-3)

Specifications & Details


Harness Features
Vehicle Sound System
Premium Sound
Main Harness Function
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
OnStar Retention
Retains Factory Bluetooth
Premium Harness Features
Factory System Amplification
Amplified
Non-Amplified
Compatible Premium Audio Systems
Standard Bose
On-Star Compatible
Yes
GM-LAN Compatible
Yes
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

PAC

Model Number:

OS-4

Weight:

0.50lbs

Internal SKU:

os4

Internal Product ID:

18009

Customer Ratings & Reviews



5 star
64%
4 star
21%
3 star
14%
2 star
0%
1 star
0%



Durability
4.9
Value
4.8
Features
4.7
Design
5
Usability
4.8

Customer Reviews

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2008 sierra

installed a pioneer 850 bt nav unit into a 2008 sierra truck

Pro, Really like the convenience wires that have the parking brake, speed wire and switched reverse power for the rear view camera!
easy to hook up but make sure you have the many plugs in real tight!

Cons, I hate the sound of the signal light I guess this is necessary? ...it's embarrassing. at least you cant hear it when the music is loud!

By Robert on March 30, 2014

15

found this helpful.

pac os-4

it works great, very easy to install. Its been in my 2011 gmc sierra for 6 months now with no problems... if i were to do it again, i wouldnt purchase this, the chime noise for it is beyond annoying and nothing like the stock sound!

By Brad on September 5, 2012

14

found this helpful.

Great Product

Works well in my wife's Cadillac DTS.

By Rodney on September 13, 2011

12

found this helpful.

easy to use no headache an great value

Saves time money on guessing the wires and great for the GMC Acadia and the bose system u will also need vrmd for the monitor in the back and comes pre wire for the steering wheel control and navi.

By tony big cat on September 12, 2011

12

found this helpful.

Very Easy Install

I have a Saturn Vue 2008, and the PAC audio adapter and Steering Wheel controls worked very well to install this and my other radio. For my particular car, however, I was not able to retain factory XM radio functionality. The PAC provides 2 audio RCA plugs (L/R) for the XM, but I am unable to change the stations, so it just stays on the preview station for XM. I docked one feature point for that.

The Onstar remains functional with this, just a simple mute wire going to whatever head unit you use.

No splicing of factory wires. The turn signal chime on my Vue was occasionally not making sounds, but with this, the chime never failed. And, if you don’t want alarm chimes, you can choose not to attach the chime unit.

I’d also recommend buying the PAC Steering Wheel adapter and not mixing with Axxess since this product has the exact plug to use with a PAC adapter so you don’t have to splice additional wires. I tried with two radios, two different steering wheel adapters, and both worked well for their part.

I’m back on the market for a different radio because I wasn’t impressed with features of currently available models, but I’m definitely keeping the PAC adapter for whatever I decide to use.

By Steven on August 9, 2011

12

found this helpful.

Ultimate Interface Kit

PAC OS-4 SHOULD BE CONSIDERED THE STANDARD OF THE INDUSTRY.VERY NICE PIECE OF EQUIPMENT.HOOKED UP TO MY DVD
PLAYER AS STATED IN AD.HAS ALL THE EXTRA HOOKUP HARNESSES
YOU MY NEED FOR YOUR APPLICATION BECAUSE THERE ARE SOME
DIFFERENT APPS DEPENDING ON YEAR AND MAKE OF VEHICLE.
I HAVE DONE AT LEAST A FEW HUNDRED INSTALLS PROFESSIONALLY OVER A 30 YEAR PERIOD AND BACK YEARS AGO YOU DID NOT KNOW WHAT YOU MAY GET WHEN ORDERING AN INSTALL KIT.I WOULD RECOMMEND ONE OF THESE TO ANYONE DOING AN INSTALL THAT REQUIRES A SPECIAL KIT LIKE THIS.THE PRODUCT WAS AS THE COMPANY PROMISED AND YOU CAN TAKE THAT TO THE BANK. NO GROUND OR ANY NOISES THAT
CAN RUIN AN INSTALLATION WHEN COMPLETED AND TURNED ON FOR THE FIRST TIME,THANKS FOR READING,ACE.

By ACE on May 30, 2014

10

found this helpful.

Way better than schoche or metra

Had a schoche one, it started making screeching noises and some times the head unit didn't turn on or shut off when it was suppose to. Although the PAC one has a pretty annoying turn signal noise.

By RazzleSnazzle on May 20, 2013

10

found this helpful.

Good value

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.

By Gary on September 14, 2011

10

found this helpful.

Love it!

If changing head unit this is a must have, have it in my 07 Yukon Denali & I retained everything, nothing was lost, Onstar, chimes, back up sensors, turn signals, XM, etc..

By Ben on December 1, 2010

10

found this helpful.

oac os-4

Works great love it
No problems at all
Easy to install

By denarris on March 18, 2014

9

found this helpful.

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