power window does not go down what is wrong with it?

Sounds like a regulator problem. The window may be off-track, or the switch may not work for the UP function. If the window goes down, the motor is OK, because DC motors simply reverse current to get the reverse operation.

I think littlehorn is accurate.. possible that the regulator/motor may be on the fritz. Have it looked at by a service station or call a local Chevrolet Dealer for a professional opinion

lrear drliver side window is about 2 inches from top of being closed completely. switch needs to be replaced im guessing .Push button on either switch console or door and nothing happens.