My 95 Yukon is new to me. I inherited it kinda rough and have done the following:
-replaced gas tank and filter
-new plugs,cap&rotor,wires
-exhaust from manifolds back w/new o2 sensor
-oil&air filter
-cleanedTB and Idle contol valve in TB
Problem: Starts and idles beautifully. Step into it and carries all through to top rpms beautifully. BUT...when cruising at just above idle underload it hesitates and misses. When warm seems to get worse. Happens at all speed ranges. When slowly moving around say a parking lot just as I step it up to around 1000 rpms feels like it's gonna stall.

Help, no codes detected, outta ideas what to try next.

 

changed egr valve. runs like a dream! tnx.