Just bought a new sierra 1500 after a couple of days noticed ebb idling rough especially I'm cold start 3 visits to service dept calls to customer datsatisfaction just being ...

Just bought a new sierra 1500 after a couple of days noticed ebb idling rough especially I'm cold start 3 visits to service dept calls to customer datsatisfaction just being jerked around anyone experiencing this or have any advice

Ive had the same issue...Mine does it from time to time. Im told by 2 different dealers "its normal with afm" "thats just how these trucks are, doin all they can even at idle to save fuel" im not sure the truth in it but i guess ill find out before 5/100,000

Thats bull. It idles running on all eight cylinders. My truck idles fine other then the slight shake that you barely feel. Thats a 5.3 thing.

My 5.3 in my 2005 would idle rough occasionally I attributed it to lesser quality gas I may have gotten that particular fill up (same brand names gas all the time).

Just got off the phone with a guy who strictly does dignostic work told me he was well aware of the problem since he does contract work with local dealers. Basically he said I'm screwed gm is aware of problem their solution is to hand out a service bulletin stating this is a normal condition ! Mine idled very rough on cold start evens out a bit after warm up but after spending that kind of money....time to get a lawyer sorry I switched from Ford !!

I hate to hear that man. I know my 04 6.0 I had and my 11 5.3 would get a little rough if they idled for an extended period but it was just a few seconds and then they even back out.

I notice my '12 has a bit of a rough idle when I first start it from cold, but it seems to me all it is, is the computer trying to get the engine down to the base idle as fast as possible (likely an emissions thing). I can watch the tach drop then bounce back up again because the engine was too cold to idle so low, and the computer will try again gradually for a couple minutes until the engine warms up enough to stay at the low idle.

I felt mine do it at times, but not always. I knew it was normal so I didn't let it bother me. It really is not hurting anything.

The only thing that I noticed on my 2011 Silverado 5.3 was a little rough idle when in gear and stopped at a red light etc. It only did it occasionally, and was just barely noticable. It never has idled rough when in park or neutral. Since I got the Intune, it seems to have helped a lot and I really don't notice it anymore. But maybe I have just gotten used to it. The engine should not run as rough as you are stating. I would be upset too.