A broken side mirror on a car or truck is among the most common of auto body problems. The plastic or mirror on the power mirror can get smashed or cracked and need repair. Replacing the broken power mirror with a new mirror will improve your visibility as you drive. A replacement power mirror is easy to install. The process shouldn't take more than two hours. Purchase a replacement GMC side mirror at an auto parts store or from a General Motors dealer.
Open the GMC car or truck door. Locate the screws that hold the GMC door panel in place. Unscrew the screws with a screwdriver and remove the door panel. Pop the mirror trim out of place with a flathead screwdriver.
Unscrew the screws that hold the side mirror in the door. Set the screws aside. Unhook the cable in the mirror from the cable in the door. The cables should easily slide apart at the plastic electric harness that holds the two cables together. Slide the mirror from the door.
Slide the wire cable of the new side mirror through the hole in the car door. Use a screwdriver and the old screws you set aside to secure the mirror to the door. Connect the cable of the new mirror into the cable in the door at the plastic electric harness. Screw the door panel back into place. Pop the window trim into the door.
