Truck will not shift into any gear
I have a 1995 gmc sierra. Truck runs great and never had a problem. I drove to work stopped put it in park, when I
returned i shifted into reverse there was nothing, I cycled thru all gears and nothing. I had a co-worker shift it while I
looked underneath to see if linkage was working and it is fine. What might be the cause and what should I do to fix
it