new 2019 gmc sierra park assist not working, checked all settings, read manual, called dealer said need appt to check computer,
watched some videos on troubleshooting not much help, went out to truck with windex and papertowel, wiped all sensors and all cameras and presto park assist working just fine. had just driven down a wet dirt road 2 miles, sensors didn't look dirty but must be very sensitive. if you take your truck to dealer ,make appt and waste your time the dealer will say reset computer, or something, dealer gets paid for warr. call and tech gets his time, and all they will do is clean your sensors presto its fixed. hope this saves someone the trouble and time.
