Discussion Starter · #1 ·
I've got a 1994 GMC Sierra 1500 and in the last year or so it seems like every time it rains or gets wet the transmission shorts out and gets stuck in either 2nd or 3rd gear (cant really tell). I'm not sure if it is going into limp mode or if its something else. It will start out in first and up shift and downshift a couple times but will just randomly get stuck in a higher gear. If I try to manually put it in first after its done this the transmission whines and the truck will not move, if I turn the truck off for a minute or two it will start in first and repeat the process. Just wondering if one of ya'll could give me an idea as to where to start looking for the problem?