Originally Posted by TerminatorX5

i went over this thread, and I wonder if your car was ever prewired for a Nav... Did I look up your VIN for the factory options? If I did not, what is the last 7 digits of your VIN? I can look up to see if you car ever had a factory nav in it...

when your aftermarket GPS was installed into the car, the installer may have changed something in the programming of the car or in some wiring - when the car was serviced at the dealership, the dealer may have reset the software of the car to it's factory default values, and/or reconnected the wires that the GPS installer may have changed, in the factory fashion, thus "killing" the GPS.

just a thought...