* Window Regulator: This is the most common culprit. The regulator is the mechanical system that actually moves the window. Over time, the cables can fray, break, or become detached from the motor or the window itself. This often leads to the window falling or being unable to move at all.
* Window Motor: The motor powers the regulator. It could be burned out, worn out, or simply have a faulty connection.
* Switch: The power window switch itself could be faulty. It's possible the switch is internally broken, although this is less common than regulator or motor problems. Try testing the switch by swapping it with the passenger side switch (if it works on the passenger side, the problem is likely in the driver's side switch).
* Wiring: A break or short in the wiring harness leading to the motor or regulator is another possibility. This is often caused by wear and tear, especially in areas where the wires are frequently flexed. Corrosion at the connections is also a common issue.
* Fuse: Though less likely if the other windows work, a blown fuse for the power windows could be the problem. Check your owner's manual for the fuse box location and diagram.
* Master Window Control Module: Some Grand Ams have a central control module for the power windows. A fault in this module could disable the driver's side window. This is less common, but possible.
Cost to Fix:
The cost to repair the window varies greatly depending on the problem and how you choose to fix it.
* DIY Repair: If you're mechanically inclined, you can often find replacement regulators and motors online relatively cheaply ($30-$100+ depending on the part and where you buy it). However, you'll need to factor in your time. Replacing the regulator can be a somewhat involved job, requiring some interior panel removal.
* Professional Repair: A mechanic will charge for labor in addition to the parts. Expect to pay anywhere from $150 to $400 or more, depending on the shop's labor rates and the complexity of the repair. Replacing the entire regulator assembly is usually more expensive than just replacing the motor (if that’s the only issue).
Recommendation:
Start by visually inspecting the window regulator mechanism (you'll need to remove the door panel). If you see broken cables or other obvious damage, that's likely the problem. If the mechanism looks okay, try checking the fuse. If everything seems okay, then the motor or switch is more likely the issue. Replacing the switch is generally easier than the regulator or motor.
Before buying any parts, it's wise to thoroughly diagnose the problem to avoid unnecessary expenses. If you're not comfortable working on your car yourself, taking it to a mechanic is the safer option.
