The windshield wipers may not work intermittently due to a faulty wiper motor control board. Our technicians tell us that lightly taping on the wiper motor when the fault occurs should temporarily get the wipers working again. Some vehicles were recalled for this problem and some were not. You will need to check with your local dealer to find out if a specific vehicle was included.
Windshield Wipers May Fail Due to Faulty Wiper Motor Control Board on Chevrolet 3500 Pickup
Average mileage: 93,000 (11,000–175,000)
13 people reported this problem
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windshield wipers move erratically sometimes stopping strait up blocking my view of the road when driving.
Wipers would quit mid wipe. Could restart by switching to high setting then back. Replaced with NAPA unit but it started again 1 week after 12 month warranty was up but NAPA replaced it anyway. Found out from a friend that it was the control board & GM had a "kit" to resolve the problem. After I installed the kit(new board and cover) GM had a recall. I called them & they reimbursed me for all the work. It was moisture getting into the wiper motor housing that was the problem. It now has 203,000 miles & no issues 1996 Silverado C3500 7.4L Crew Cab 2wd.