The motor for my driver side window is slowly dying. It always either goes very slow, only goes halfway up or down, or doesn't move at all. About how much will it cost to replace this piece or, if possible, can I fix it or prolong the life of the motor?

 

motors themselves run from 35 to 100 bucks. check in the how to and faq sicky at the top of this section.

 

The 4th Gen window setup really sucks, while my RS is in the shop, my rental's windows (Chevrolet Colorado LT) fly up and down by comparison...