How do you fix power window on a1989 gmc vandura 2500 van?

To fix the power window on a 1989 GMC Vandura 2500 van, first, check the fuse related to the power Windows and replace it if necessary. If the fuse is intact, remove the door panel to access the window motor and switch. Test the switch with a multimeter; if it's faulty, replace it. If the motor is the issue, you may need to replace it, ensuring all connections are secure and lubricating any moving parts during reassembly.