holy funk this started happening to me today while going to pick up my daughter. 1997 k1500 burb. I think it's coming from the 243c transfer case. sounds like it anyways and it dosent actually do it all the time. some other weird **** started happening as well. abs and brake warning lights both lit up. windows wouldnt roll up. we had a hell of a rainstorm and it appears that some water got in the dash fuse panel, maybe. I'm grasping at straws here but i have a fan blowing up under the dash to dry anything out. could also have been spilt coffee from the passed. windows started working and the brake warning light went off, it's still full of fluid and the brakes work.
no F'n codes either! maybe it has something to do with the incorrect DEXVI fluid that might be in it. I dunno....
But I do have another xfer case on stand by. ;-) just gotta wait for the weather to break. and give me a good day to tackle it.
oh and I just remembered that the speedo started to seem delayed and incorrect and the tranny seemed to have been stuck in 3rd.... BUT no codes.... which leads me to believe a mechanical failure of some sort and maybe... some water intrusion but I honestly cant see anything actually wet.
some beach.
Al