2004 chevy trailblazer_lt
Okay, so I started up my TB for the first time in a while Saturday (but it's being regularly used by someone else), and there was this terrible squealing noise. Rather loud, definitely heard it inside the car. So, I popped the hood, and tried to figure out what it was. I'm pretty sure it was coming from the left side of the engine (as I'm facing the front of the truck). Is this the idler pulley? I think it was the larger pulley on the top, not the smaller one on the bottom, but I didn't stick my head down there to find out. The noise also went away slowly, kind of degrading into an occasional sqeak (every second or two), and then it went away. Maybe the belt's slipping around the pulley? I'm not sure. I looked up idler pulley, but most of the posts seemed to be about a whinning noise, which this is definitely Not. Well, I do have an occasional faint whinning noise, but I think that's the power steering pump (it's barely noticeable). What do ya'll think?