Hey guys, I have a 1997 K2500 Burb
5.7 with a 4L80E
its got 340k miles so she’s old but I figured I’d see what the consensus was

no lights or codes, but my truck won’t move unless I let it idle for 5min or so. No shifting issues, I still pull my 30’ travel trailer up and down the east coast, just have to start it about 5 min before leaving. Not a big deal but still unusual

i did the filter and a fluid change about 6months ago but it still does it.

im sure it could be due for a new/rebuild but figured I’d see if anyone has had any similar issues. Maybe converter or a solenoid or something.

thanks!!!