1997 Tahoe 4wd model

[skivvywaver48]

I have a Tahoe which I keep for a backup vehicle and went out the other day to drive it. Got on the highway and right off the bat, I noticed the speedometer registered 0. Then the transmission wouldn't shift from 1 to 2, etc.. drove it for a few miles and it didn't clear up so I headed back to the house. Had a friend come over today with his scanner (pro model scanner) and the only code that showed up was nothing associated with the tranny or drive train. Don't remember the code and it was erased. Both of us think it may be associated with the TCM but I wanted to post up this thread to see if anyone else has had this issue and if so, what fixed it. Any help will be greatly appreciated as I don't want to sink a lot of money into the suv but would love to keep it in case my truck craps out. So guys, what say you?

Mike from NorthCacklacky