i just purchased used Suburban. When i start the car the DIC shows the rear parking assist is turned off.. I have to hit the little check mark to get that message off..this happens everytime i start the car.. Problem is, i dont believe this suburban has this feature.. There is no navigation display radio, and there are no sensors on the rear bumper.. Also there is no parking display thingy by the rear window... Any idea why i get this message everytime i start the car? anyway to stop this from happening? any Ideas? Thank you