Why does my liftgate not turn on when I press the up button?
Why does my liftgate not turn on when I press the up button? Usually, if this is a switch problem, one of the two switches will work fine. If both switches do not turn the liftgate on, then you probably have a broken wire inside the pump & motor box. f. Motor runs but platform goes down when the up button is pressed. Hoses are reversed where they connect to the power unit box. Where is the disable switch on GM power liftgate? Usually has a loud clunking noise at top of gate travel just before power closing— it will...