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PAC OS-1

OnStar Interface (OS1) for Select 1996-2003 GM and Pontiac Vehicles

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List price $119.95

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$56.56

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PAC OS-1

OnStar Interface (OS1) for Select 1996-2003 GM and Pontiac Vehicles

$56.56

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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:

  • Chevrolet:
    • 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

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 (-)

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
The various features that the wiring harness provides to your car stereo and/or audio system.
OnStar Retention
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Cadillac
Chevrolet
GMC
Pontiac
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Cadillac Escalade
Chevy Avalanche
Chevy Blazer
Chevy Silverado
Chevy Suburban
Chevy Tahoe
Chevy Venture
GMC Sierra
GMC Yukon
Pontiac Grand Prix
Pontiac Montana

Premium Harness Features

On-Star Compatible
This means that the harness is compatible with vehicles that have On-Star built-in.
Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

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

Average Attribution Rating

Durability
4.5
Value
2.8
Features
4.5
Design
4.3
Usability
4.8
Richard

Canada

Overall
Durability
Value
Features
Design
Usability
PAC OS1

July 24, 2007

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.

16 of 19 found this helpful

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Stephen

APO, AP

Overall
Durability
Value
Features
Design
Usability
Works

May 19, 2011

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.

13 of 17 found this helpful

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chris

evans, CO

Overall
Durability
Value
Features
Design
Usability
works

April 3, 2015

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

10 of 12 found this helpful

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kevin

OKLAHOMA CITY, OK

Overall
Durability
Value
Features
Design
Usability
Good but not a good price

March 13, 2015

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.

11 of 14 found this helpful

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Browse 1 question and 3 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I didn't know about the on star hook up harness. I hope this works.
rAY P on Jun 15, 2016
Allows me to have the chimes and keeps my databus happy.
Carey J on Jan 15, 2015
was recommended for a easy install thanks sonic
kevin b on Feb 9, 2015

Product Summary

Manufacturer

Model Number

OS-1

UPC

606523105620

Weight

0.95lbs

Internal SKU

os1

Internal Product ID

5273

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: PAC OS-1