If everyone who has this problem waits for a bulletin to be issued, it will never be issued. Engineering monitors labor operation numbers to see what is happening with the repair of the vehicle.
At this time, I see nothing on the radar screen for wiper problems. There are numerous reasons why this is suddenly noted here on the forum. (For one thing, I have seen two different symptoms, yours where the wiper comes on for no reason, and one where the wiper stops at mid-glass when turned on.)
A supplier could have a problem, and did what they call a "spill" of bad parts. This spill might only encompass a certain number of vehicles. A spike in warranty, with a specific VIN range will show this.
It might be a major problem affecting all modules, or it could just be a problem that affects only a small number of vehicles.
My suggestion to anyone is take the vehicle to a dealer and report the problem.
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Black Sheep Hummer Squadron
(ME TOO)
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