Dave, good news for you. There is a recall for the master switch on the drivers door. The recall involves water being able to get into the switch. I wouldn't say anything, just call and ask about the the recall. This "module" is the switch itself. Pop the plastic trim upwards, the switch comes right up.
SOURCE: i have a 2005 gmc envoy and the driver door module
I have the same problem , went to dealer to find out i have a bac module , cost 500
SOURCE: 2003 GMC Sierra - intermittent behaviour on driver
I suggest replacing the switch on the passenger side. Chances are the switch is faulty by a back connection inside - switch is wore out - if it works every now and then.
Let me know if you need further assistance.
carsandcomps,
Guru, Premium Expert @ Fixya.com
SOURCE: Driver side door, electric windows and lock will not work.
If windows still work from other door switches, then fuse is good, if not check fuse, if they do replace master window switch, shorted out with the water.
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