The blower motor in a 2002 Buick LeSabre provides the force to move hot and cold air through the vehicle's ventilation system. As this motor ages, the bearings inside it can wear out, causing a high-pitched whine or vibration that is audible from inside the passenger cabin. Replacement blower motors are available from automotive parts stores, automotive salvage yards and Buick dealerships.
Shift the Buick's transmission into park and turn off the engine. Apply the parking brake and turn on the interior dome light.
Remove the plastic panel underneath the passenger side dashboard area. This panel contains built-in retaining clips and simply pops off by hand.
Remove the three 8 mm nuts holding the blower motor assembly into the dashboard HVAC unit, use a 1/4-inch ratchet and an 8 mm socket. Remove the blower motor's electrical connector and discard the old blower motor.
Install the new blower motor in the HVAC cavity and replace the 8 mm mounting nuts. Reconnect the blower motor's electrical connector and replace the plastic panel. Turn on the ignition and test the blower motor on all of the fan speed settings.
