2004 silverado wiper pulse board
#2
Senior Member
True Car Nut
I believe the wipers in yours are controlled by the BCM, so probably the switch is tired. You might have some luck switching it back and forth across the entire range a bunch of times (with the ignition off), then try again with the ignition on and see if it made a difference. If it does make a difference then you have confirmation that the switch is flaky.
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