[BarryGMC]

They self cancel. You should just get a new switch, the canceling arms are broke. Now rumor has it you can find switches that are a direct replacement for the gmc. I have never seen one other than nos. but maybe there is. I don't buy repop parts other than window and door rubbers. If you look at a thread started by gmcnut not to long back we discuss the problem and the solution. Barry