They have cable driven regulators. Over time the cables either break, or get bound up which breaks the plastic pully. You need to replace the regulator. I have replaced my drivers door 3 times. Passenger door once, and both rear doors once. It is easier to replace them as an assembly. (Motor and regulator together). If you only do one or the other, it can be difficult to respool the cable to the pully if it should come off.
How do I take the back panel off
should be under the dash board on driver's side
under the air filter box and battery platform front driver side
how replace vertical window guide channel
Bad regulator
It is on the driver's side (Left) of the trunk. Peel away the carpeting on the upper left side of the trunk and you will see it suspended.
check around your window on that side sometimes they will separateand you will have to have it fixed
Left hand side on the top or side of theradiator
The thermostat is located on a 2003 Oldsmobile Alero in the thermostat housing. The thermostat housing is located on the rear side of the engine block.
Bolted on the right side of the trunk
Just press the reset button at the fuse panel on the driver side. Press it for some seconds and it will clear the light.
Dealer or salvage yard.