In the Make a service request area, choose Uninstall a tracking unit. Use the + and - buttons to select how many tracking units you want to uninstall, then choose Get started. In the Vehicle details section, open the Vehicle list and select the vehicle that you want to uninstall the tracking unit from. Enter the vehicle’s registration number
Turn off the vehicle. Open the trunk. Take out the trunk liner. Remove the spare tire. Take out the trunk still plate; it may need to be unscrewed. Access the OnStar device by removing the trunk shell. Locate the OnStar box; it may have an OnStar or LG logo. Unplug the OnStar device and disconnect all three wires. This video demonstrates how to install a vehicle GPS Tracking device. GPS devices need to wired correctly and put in a properly location to work properly. Tracker. I was working on my car with my father and when he went to look for the fuel pump relay he looked in the fuse box, he saw a couple blinking lights. The car had no key in the ignition at the time. We pulled it out, and it was very obviously not oem. When we looked up the CDMA number, we found that it was a tracker.