2001 GMC Yukon XL 1500 SLT 8 Cyl 5.3L
rear wiper does not work...it is just a bad motor?
It worked some time, then It use to make a humming noise and the rear wiper would not move, Now it does nothing.
first chk the fuse if blown replace and try wiper if it blows again you have a short and could be in the motor. if fuse is good chk for power at the motor w/ a test light or meter if you have power and a good ground could be the motor or the switch see if you get power w/ the switch on. also these wipers also get stiff linkage exspecially where the shaft goes through the body . from what you describe sounds like the linkage got stiff and burned out the motor