[H2-USA]

Sounds like a past recall item.

I have a 2003 H2 and the same thing,
washer sprayed out all the fluid, had to pull that fuse
wipers went ape and randomly came on, had to pull that fuse

Contacted dealership just as I received a recall letter. Great Timing for all.

Anyway, dealership fixed it all N/C - known problem for many GM trucks.