Yes, it is the pulse module. But before you buy one, you might want to pull yours out and look at the circuit board. There's a thread on FSC.com I believe where the guy says that the vast majority of bad pulse modules are due to a cold (bad) solder. He claims to have repaired several simply by identifying the bad solders and re-soldering them. I haven't tried it yet myself, but I may be shortly...
I came over to the forum to ask about my wipers too. I replaced the pulse module in mine a couple years ago (before I knew about the solder issue). It died completely--no wiper speed worked. A new pulse module fixed it right up.
But in the past several months, there have been times when my wipers will not work, and other times that they do. The thing that is different this time is that when I turn them on, I hear a buzzing sound from the motor assembly. The last time my wipers died, it didn't make any sound at all. This sounds like a small gear that is not meshing properly and is just buzzing against something.
Has anyone here ever dealt with the guts of a wiper motor to know if this is possible? Or is this likely to be yet another problem with the pulse module?
---------- Post added at 10:44 AM ---------- Previous post was at 10:42 AM ----------
Aha, here ya go (you might need to sign up for FSC to read it)
http://www.fullsizechevy.com/forum/general-discussion/interior-tech/450020-wipers-wont-stop.html
http://www.fullsizechevy.com/forum/...6464-fix-those-wipers-wiper-board-repair.html