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Where is OnStar unit on ’03 gmc truck

Printed From: the12volt.com
Forum Name: Mobile Video, GPS, and Navigation
Forum Discription: Mobile Video Head Units, DVD Players, LCD and TFT Monitors, Navigation, GPS, PS2, PS3, XBox, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=23634
Printed Date: August 17, 2025 at 3:00 AM


Topic: Where is OnStar unit on ’03 gmc truck

Posted By: dmk-00
Subject: Where is OnStar unit on ’03 gmc truck
Date Posted: December 30, 2003 at 5:32 PM

I would like to utilize the cell and gps antenna from my unused OnStar. Has anyone done this? Where can get to these wires? Thanks



Replies:

Posted By: sparkie
Date Posted: December 30, 2003 at 8:12 PM
The Onstar unit is above and behind the glove box. If you open the glove box and pull the tabs in the upper corners you can flip it out of the dash and get to the connections you are looking for. The unit is a silver box just behind the tubular dash support. Hope this helps.
Sparkie

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sparky



Posted By: dmk-00
Date Posted: December 30, 2003 at 11:20 PM
Just the answer I was looking for. Thanks Much!


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