Hello my name is April Smith, 2003, 4.2 vortec, Trailblazer LT
I just bought this and having issues ... see when you are going your for real not.
i guess to me it feels held back and when you press on accelerator it dies down.
checked throttle body and cleaned and that didn't help issue also my rpm and speedometer cluster not registering ??
And my regular headlights they come on n off by themselves

PLEASE ANY AN ALL ADVICE WELCOMED
and thank you guys for having this site

 

We really could use some OBD II codes, and welcome to Chevrolet Forum, April.

 

Welcome to the forum from Florida. I used to have an 03 Trailblazer and had many issues with it. My speedometer went crazy and I had to change the stepper motors for it. While at it, I changed all 6 stepper motors as eventually they would all go bad.

 

change your stepper motors like stated, but this wont fix your problem. also have your fuel pressure tested with the key on engine off then start it see where it at then

 

im sorry it had a p0322 code

 

well hello ya'll i wanted to update my post,
i had originally got on here and asked for any possible help with what would keep my TB from accelerating.
it was throwing the p0322 code i believe, and engine power reduce light and check engine light on.
I had replaced the throttle body the one on truck was broken when held it and shook it had loose parts rattling inside, then it still fell on its face when try to give gas. I thought the catalytic converter clogged.. guess what it was i was so happy to know it would be much cheaper to repair.
My friend cleaned out my old cat and put back on.
I still haven't figured out why my speedometer and rpm cluster dont register but at least its running and it drives so smoothly
THANKS AGAIN FOR ALL ADVICE SORRY I WAS SLOW ON LETTING YOU KNOW RESULTS

 

Have you had it checked by a mechanic?