Removal of old rental car computer
My main concern is that the tracking unit would cause the vehicle to be disabled. It was likely installed by Hertz and would have been approved by Hummer as a fleet vehicle for warranty purposes. The vehicle has been owned by at least two other people since then. It might be a little different than a standard tracker.
Here are a few pictures from the outside. That's an old shop that I work at thats been open since 1939. I make drivetrain tooling.
I believe the oem gps antenna is attached to the Hertz tracker.
You can see the GM tower in Detroit behind the vehicle.



