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Re: Wiper Motor stops and buzzes?
Welcome to the forum.
A very common problem is the solder connections on the pulse board will break and lose contact. Some people have pretty good luck resoldering them. I prefer to replace the module with an improved one made by Dorman. They are available at most parts stores for around $30 USD. Three torx screws hold it to the wiper motor and it takes about 5 minutes to replace. Be sure to stuff a gob of grease on the gears and then run a small bead of silicone RTV around the module before you install it to keep the water out. Hope this helps. BTW Check out the Blazer forum, there's a lot more activity there and it's basically the same vehicle.
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