Hi, newbie here to forum. (I'm a corvetteforum guy) Seeking assistance with my wife's 2000 GMC Sierra 5.3 - (stock engine/driveline - for now) Truck has developed an occasional low idle at startup, which sometimes results in stalling. Off-idle/acceleration is fine. I have cleaned throttle body and IAC passage- no help. Truck is also not setting any codes.

Can anyone help ?

Thanks

 

I moved this to the GM Tuning Forum... don't think any of us Dodge guys can help you with that one we have enough trouble with our own LOL

 

You need to clean your throttle and if that does not fix it turn the idle screw out 1/2 turn at a time till the problem goes away. Your IAC motor is working to hard to control your idle.

 

OK, so it helps if I'm in the right forum. Thanks !

Turns out it was a faulty fuel pressure regulator.
The truck has a lot more throttle response too now.
I'm sure mileage will improve as well.

 

Crash,

Awesome Truck !!!

We bought a Whipple kit for ours a while back, but I never installed it.
Just sitting in a spare room, in the box.