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drawson · 07-09-2007, 03:19 PM

Actually I did both

1. Used the antenna to work with my handheld GPS
2. Hooked up serial port to Module to use with car PC.

Check this site as it still has the info or most of it. Took some work and good soldering skills but it worked. I used and IC to go from the 5v signals in the Onstar box to true RS-232 levels for the PC. The onstar boxes were very easy to access in the trunkof my car. Depends on your vehicle and year, I had a 2001 Grand Prix GTP.

I have since sold the car-too many leaks and miles.

http://www.hackaday.com/2005/03/29/gm-onstar-hacking/

07-09-2007, 03:19 PM	#22
drawson Newbie Join Date: Dec 2005 Posts: 6	OnStar Hack Actually I did both 1. Used the antenna to work with my handheld GPS 2. Hooked up serial port to Module to use with car PC. Check this site as it still has the info or most of it. Took some work and good soldering skills but it worked. I used and IC to go from the 5v signals in the Onstar box to true RS-232 levels for the PC. The onstar boxes were very easy to access in the trunkof my car. Depends on your vehicle and year, I had a 2001 Grand Prix GTP. I have since sold the car-too many leaks and miles. http://www.hackaday.com/2005/03/29/gm-onstar-hacking/