Is there any gps tracking installed?

Answer:
If you want to block a GPS tracker installed in your car you need to use a GPS jammer. For example, if there is an OnStar GPS navigation in your car you can read more here how to block it - http://blog.jammer-store.com/2011/09/onstar-is-selling-your-gps-data-to-third-parties/.
First answer by MichaelKharwin. Last edit by MichaelKharwin. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].