I recently bought the Terrain it's the SLE-1 model and want to change the factory stereo that comes with it to a in-dash navigation system something more like the the SLT-1 & 2 models I believe its a pioneer. The problems that I'm having is I can only go through the dealership if I go anywhere else it would void my warranty. In my vehicle it has a compartment door right above the stereo. I know that part can be replaced to the exact same cover that is feat. in the SLT models but not sure where to order the parts and it seems that there is no dash-kits or harness for this vehicle as well as very limited accessories for this car. Please help!!