I have a 1977 GMC Suburban with a power rear window in the tailgate.
It has become very hard for the motor to open or close the window and it makes a screeching sound when being operated.
Does the interior window frame need lubricated or is it rubbing on something?.
I know there is a access plate on the inside of the tailgate but the window denies access to the inside of the tailgate.
Is there a way to open the window when the tailgate is open so I can access the interior of the tailgate?.
Thanks for any insight.