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PAC OS-1

Add an Aftermarket Radio and Retain OnStar in Select 1996-2003 GM and Pontiac Vehicles

PAC
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• OnStar Interface
• Retains OnStar Usage For Aftermarket Stereos
• Remote Wire Output
• Will Not False Trigger
• LED Indicator

Learn more about the os1

We apologize

This item has been discontinued


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Description


PAC brand icon

Authorized dealer

Harness Features:

  • OnStar® interface
  • Maintains operation of OnStar for aftermarket stereos
  • Incorporates a microcontroller that communicates directly with OnStar's serial data protocal to prevent false triggering thus eliminating unwanted audio noise through speakers
  • Onboard amplifier will drive two, 4 ohm speakers in stereo
  • Use with existing speakers in front doors or use external/separate speakers
  • 12 volt remote out to turn on factory amplifier and mute wire to attenuate the aftermarket stereo
  • LED indicator and volume control
  • Built in audio isolation circuit eliminates engine noise
  • Will not false trigger
  • Note: The OS-1 will not work with OnStar® equipped vehicles that have factory radios with RDS (Class 2 headunits). Factory radio's with RDS can be indendified by locating an RDS logo on the front face of the factory radio. OS-1 currently supports trucks and SUV's from 1996-2001 and 1999-2002 Pontiac Gran Prix. Pontiac Grand Prix with Bose® requires a OEM-1 and a AMP-GM21B wire harness
  • 1-year SonicElectronix.com warranty

Compatibility List:

  • Cadillac:
    • 1999 - 2000 Escalade
    • 2002 Escalade
  • Chevrolet
    • 2002 Avalanche
    • 1999 - 2001 Blazer (S-10)
    • 1998 - 2002 Silverado
    • 1998 - 2002 Suburban
    • 1998 - 2002 Tahoe
    • 1998 - 2000 Venture
  • GMC
    • 1998 - 2002 Sierra
    • 1998 - 2002 Yukon
  • Pontiac
    • 1999 - 2002 Grand Prix
    • 1998 - 1999 Montana
    • 1998 - 2000 Silhouette
Notes: Not compatible in vehicles equipped with an RDS Radio

Connections:

  • Yellow – 12V Constant
  • Red – 12V Accessory
  • Black - Ground
  • Orange – Dash Light Dimmer/Illumination
  • Green – Left Rear Speaker (+)
  • Green with Black Stripe Left Rear Speaker (-)
  • White – Left Front Speaker (+)
  • White with Black Stripe – Left Front Speaker (-)
  • Purple – Right Rear Speaker (+)
  • Purple with Black Stripe – Right Rear Speaker (-)
  • Gray – Right Front Speaker (+)
  • Gray with Black Stripe – Right Front Speaker (-)

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Specifications & Details


Harness Features
Main Harness Function
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
OnStar Retention
Premium Harness Features
On-Star 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-1

Weight:

0.95lbs

Internal SKU:

os1

Internal Product ID:

5273

Customer Ratings & Reviews


PAC OS-1 thumbnail image

5 star
50%
4 star
0%
3 star
50%
2 star
0%
1 star
0%



Durability
4.5
Value
2.8
Features
4.5
Design
4.3
Usability
4.8

Customer Reviews

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PAC OS1

The OS1 works flawlessly. It is very easy to install. When I activate OnStar the front speakers from the cd reciver mute and OnStar is projected through them. My cd receiver had the brown mute wire so I cut the relay off completely and attached the red power wire directly to the cd receiver's harness. Although the unit is quite bulky and big I still managed to fit it behind my 2002 GMC Sierra dash quite easily. The factory connectors plug in and clip for a very secure connection. It keeps the factory door chime and retains accessory power when you turn off the vehicle and take out the key. I personally don't like the retained accessory power (rap) because I have a removable face plate and I like to take it off as soon as I turn off the vehicle. I guess I'll just have to open the door a little before I take off the faceplate because I don't like removing the faceplate while it is still on even though it may or may not damage the cd receiver. All in all this I would recommend this unit to anyone looking to retaining OnStar capabilities.

By Richard on July 24, 2007

16 found this helpful


Works

The product did the job when I received it the second time. The first time I was sent the wrong thing and the headache of returning it and I had to pay for shipping it back. The pack works great and haven't had an issue with it since it was installed. Absolutely no complaints there.

By Stephen on May 19, 2011

13 found this helpful


works

does what it says it will do. really pricey for what it is though.

By chris on April 3, 2015

10 found this helpful


Good but not a good price

works great but can get for halve the price at competitors lucky i got a nice discount form sonic when i got my set up thanks sonic.

By kevin on March 13, 2015

11 found this helpful



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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.