Brake service mode, 2025 sierra.
Im lost at this point. Trying to do rear brakes, follow all the steps, get to the yellow P and wrench flashing. Release my foot and finger, push the park brake again and the yellow P flashes 5 times and goes out and the parking brake stays on.
UPDATE: Seeing I live in a very rural town with one garage whos booked for the next 2 weeks and my next closest garage is well over an hour away, I decided to take the chance and release the parking brake manually. Removed negative on battery, took the little motor off and changed the brakes. Upon completion, there wasnt on code/engine light on. And it wasnt that had to do.