I have a 2002 Chevy Tahoe that I recently had the solenoids replaced in transmission because my check engine light was on and after getting the Code read indicated a Fault which corresponded with my trans slipping in passing gear or after downshifting into a turn, problem solved, code cleared, within a half hr truck started to misfire or hiccup under light load in overdrive, if I put truck in 3rd or pushed tow button it seemed to go away, truck has 5.3 l with 200,000 miles and runs like a champ any other time and before replacing solenoids

 

Possibly something got disturbed when the solenoids were replaced. Any DTCs w/ the "misfires"? I'd check any connectors that might have been disturbed.

 

I'm thinking it's just a coincidence about solenoids because I found quite a few threads online with the same problems but no real solid answers except change plugs and wires, so that's the next thing , I get no codes right now so no help there