The transmission is acting up on my '93 Chevy 3/4 ton 2 w/d pickup.  It's a
4L80E with a 6.5 turbodiesel.  I noticed it would be in 2nd gear from a dead
stop instead of 1st.  Also, it won't shift into 4th.  The TCC is working in
3rd.  Also, if I put the gear selector in 1st and try to move from a dead
stop, it's just as if the brakes are locked.  Won't move in 1st.  It's got
235,000 miles on it and has never been rebuilt, and I imagine that's what I
need to be ready for.  Haven't put my scan tool on it yet.  No SES light.
Was just wondering if anyone here has seen this before and it's something
simple like a shift solenoid or something easy to replace?  Been far and
away the best pickup I've ever had and I intend to keep it as long as
possible.  Thanks for any help.

Garrett Fulton