Three Common Issues of the Pontiac Grand Prix Window Regulator
The window regulator of your Pontiac Grand Prix, along with the other parts of the window assembly, is essential because it works to ensure protection for the car's interior. However, it will eventually malfunction through years of constant use. If you're beginning to have a hard time controlling the window of your car, then you should do some troubleshooting to determine what the problem is. Here are some common problems you might experience:
Only one window is working.
If the driver-side window of your car is still working but all the passenger windows are already malfunctioning, then the problem may come from a faulty connection. The Grand Prix's window connection setup is a bit intricate. The driver's door serves as the master control for all four windows, and each passenger door has a control box inside that's connected to a module located under the driver's seat on the floor. It is very likely that the control box had water problems which could have ruined the wires inside. You should check the control box if it still has power. If it has none, then you need to find the exact control box replacement for your car's model.
The car window doesn't smoothly go up or down.
If your car window fails to go up or down properly, then loose bolts from the window regulator or a failing electric motor may be the cause. What you need to do is to remove and inspect these parts. There might be debris that got stuck in the mechanical gears which might have caused the window to malfunction. Once you have removed debris from these parts, you should test them again. If any one of the two still fails, then you have to find a replacement.
The window is sticky.
The window of your Pontiac has a gasket and seal to prevent rain from seeping inside the door. If the window opens slowly or the power-window button feels sticky, then you have to check the gasket and the seal if they're torn or loose. Aside from that, there's a certain amount of friction between the gasket and the window that may slow the window as it goes up and down, so you should lubricate the entire gasket with a silicone spray or protectant to reduce the friction.