Buick LeSabre door lock and window malfunction due to faulty Left Rear Door Module on Buick LeSabre

Some Buick LeSabre owners report experiencing issues with door locks and windows, which may be caused by a faulty Left Rear Door Module. These problems can manifest as windows that do not roll up or down and door locks that fail to function properly. If the fuses are intact, the issues might stem from a malfunctioning driver's door module or driver's lock switch, potentially impacting other components as well. Additionally, some owners find that troubleshooting a door that refuses to open, whether from the inside or outside, may require checking for faulty mechanisms, damaged components, or normal wear and tear. Overall, a malfunctioning Left Rear Door Module can significantly affect the vehicle's electrical system functionality.