It is the drive belt idler pulley - 55581830
Also, the auto parts stores are telling me that GM has not released the accessory belt patton yet so they can't get them.
Am I wrong that this is about 4 years old?
Gangly, where did you purchase your replacement belt?
Also the dealership told me if the belt is squeeking that I also need to change the pulley. Is that true?
Does anybody know the part number for the accessory belt and the AC belt?
Mine started the belt chirp noise when I got it back from the lifter repair. They corrected both sides with push rods, lifters and springs. It wasn't near as bad then as it is now. I should have raised concern then but I didn't. Now I am at 37k miles. I'll check for the belt residue and probably just start purchasing parts.
I had all 16 done at around 8k miles and now have over 13k miles with no issues at all.
I do still really like this truck. I have no plans to trade it in or anything like that.
Honestly my only concern is the mark it has on it because the engine was worked on. That means nothing to me but a lot of people are making it sound like something is wrong with a truck that was fixed so that is all.