I have a 2007 chevy tahoe which was hit in the rear they replace the sencer in the bumper my panel still say service park assist and the off and on button doesnt turn it on so how do you reset it.

See the awd fuse in under hood fuse box, not only check the fuse, use a test light and check voltage on fuse circuit, key on. There shows to be four park assist sensors at the rear bumper, they have three wire connector, that is ref voltage--ground--signal. You also have a rear park assist module, At the moment, I don't know where that is located? Any applicable trouble codes relating to rear park assist? I have some text explaining the operation, but, not really any troubleshooting sequence.

check fuses and relays --for the tpi if all tires are up on pressure and on screen is showing a dash for one of them than that tps is faulty they fail like any other sensor have the trouble code read for problem most auto stores offer this service for free after code read you can ask them to clear/erase which will reset settings / computer --with oark assist if dirt, debris, some one hitting rear bumper, towing/carrier mounted will shut off park assist

you will find the park assist sensor on that side where it was hit is either unplugged or broken.

Back of the bumper

where is the parking assist sensor??

could have but maybe the sensor is bad or your oil pressure has dropped you need to have it checked asap !! by a specialist !! or ? More Info please !!!

#PIT4878: Service Park Assist Message / LEDs Stay On Or Inop - keywords B0968 inoperative lamp led light lit module reverse urpa - (Jun 12, 2009) Subject: Service Park Assist Message/ LED's Stay On or Inop Models: 2007-2009 Chevrolet Silverado 2007-2009 GMC Sierra With RPO UD7

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern: Some customers my comment of a Service Park Assist Message on the DIC and/or the LED indicators at the right rear pillar staying on or inoperative. This concern could be caused by the wiring harness to the LED indicators being pinched under a ground eyelet at the right rear pillar, as shown below.


other issues could be the problem such as poor connections at each sensor or damaged sensors. to clear URPA codes,place ignition in run,(engine OFF),shift into reverse and turn key OFF.place shift lever into park and retest operation of URPA. if still inop URPA code(s) need to be retrieved before further diagnosis can be accurately done.

Check for damage on the rear bumper. There are 4 sensors there that detect objects when backing up. They are quite fragile, and don't take much abuse before failing. If they all look good, check the connection behind the bumper. Its still most likely a failed sensor, someone probably hit you in a parking lot.

Vehicle sounds like it has rear back-up sensors, one or all may have failed. Will have to scan for the codes, a dealer scanner may be the only way to read those codes.

Remove bumper or use a swivel adapter to remove