Change the mass air flow sensor. Trust me, I went through everything. Fuel filter, tps, pressure test fuel, catalytic converters, O2 sensors. Sent truck back to tranny place and old guy there told me to change the maf. I wasn't getting code but was at a loss for what else to do. I did and now my 99 Tahoe runs like a raped Ape again. I hope this helps.

 

. I have a 95 sierra that iis doing the same thing only when engine light is on. Qhwn engune light is off it does perfect. Already changes computer. No change. What else could be the problem????