I have no codes but idles rough and stalls out 2003
Stalls mainly when coming to a stop? I would suspect a dirty/faulty idle air control valve.
Where is it at, I have that fly by wire excelerTor crap
Is yours the 4.6L? I believe on yours it's on the right front of the throttle body if you looking at your engine. It has two small screws holding it in place.
It's a 5.3 and you are describing the regular cable excelerator mine is the morthadike electric servo operated excelerTor. I'm wondering if the iac is part of this unit. Only one wire harness feeds this throttle body unit.
Yours on the left hand side with a wire harness with about six wires in it? Looks kind of like two round items built together in a square box? If so it's in there. I not sure if that is serviceable without changing the whole throttle plate assembly. If I remember correctly that's all riveted together. Sorry I could not be of more help.
Looking for a Used Sierra 1500 in your area?
CarGurus has 66,317 nationwide Sierra 1500 listings starting at $1,995.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts