Ok. I recently acquired a 2000 k3500, 454 4l80e. 77k miles. I was having similar issues. Mine would idle erratic and occasionally stall, but only when warm. Cold it ran great. No codes, no ses light. Went through all of the fuel system (injectors, pres regulator, filter), did a full tune up...
I did however, replace it with this. Y2K k3500 4x4, 7.4L, 77k original miles. Just put on the 285s. Added some cosmetic stuff with a few more things to come...
Hi all. New here. White 95, stone stock 260000 miles. Black 97, 6"lift on 35's, crate engine, mpfi spider upgrade, tuning by Blackbear. The Jimmy is a 94, 4" lift on 33's, belongs to a friend.