jnicke

Disconnected the battery for 10 mins and it now works! Thanks

I have a 2010 Sierra 1500 4x4 with 21,000 miles. The park assist quit working. When pressing the button under the radio, it does not light up ever, but the display briefly show "Park Assist Off". I check the parking brake, there is no trailer hitch and tailgate is up. There use to be a beep upon shifting to reverse, but not any more. Nothing. Any ideas?