I have a 2007 Chevrolet Avalanche LTZ and my drivers side window doesn't want to go up or down. All of the other windows operate good. It's just the drivers side that doesn't want to funct

SOURCE: driver side window won't go up

To removethe window motor,Using a common screw driver go around the panel prying out the clips that hold the panel on.Be careful not to pull clip out of panel.The motor may have pop rev.or bolts holding it in.If pop rev.,you will have to drill them out,replace with bolts.

SOURCE: I have a 2002 Chevrolet

hmm,switches are hard to check ,you sure?,if so check the wiring between the drivers door and the body,from the drivers door opening and closing more than the rest,sometimes the wires will break inside the rubber boot at the hinge area ,cut the boot and peek inside.

SOURCE: chevy colandro 2005, driver window

If it is just on that side in a relatively new car with no damage check the following:
Fuses/Relays Motor Inside Door for Window/Door Lock
It could be a coincidence that both failed at once, they could be linked, or they could be jammed together. Remove the door panel and check for any damage, failures, etc. Actuate the locks and windows with the panel off to see if anything moves/fails to move as planned.

SOURCE: When I auto start my 2007 chevy tahoe LTZ the

the circuit that powers the blower motor for the heater. if this is a aftermarket auto starter i sugjest taking it back to who installed it