I have this annoying sound at idle and low speeds that sounds like a sqweaky belt.

I heard something about a TSB for a pulley belt tensioner or something like that for the '99s. Is that what this is? It sounds like there's 100 parakeets under my hood!

I went outside to check everything over, but can't find anything loose. Is there anything I can do to get rid of this noise?

 

When I had a squeaky noise from the belts it turned out my water pump was broken and leaking coolant onto the belts.

Check your coolant level.

 

I thought my belts were squealing and replaced both of them. I needed to change them anyway cause it cheap insurance w/102k miles.
Then it sounded like I had a blower under the hood or altenator was bad. In checking I found it was the idler plley, on the same side as altenator (not the tensioner on passenger side).
I replaced the bearing in it and now NO!! blower or belt noise.
Replacing the bearing from a bearing shop was almost as expensive as the complete pulley from GM.
They, GM wanted $48, (I know, some one will say they can get one for $5.99) but I never find those deals.
I bought one of those cheap stephecopes (however in the hell you spell it) and found the little bugger bearing.

 

Defective idler pulley is very common in 99's. I personally know of four 99's which have needed a replacement and countless others I've read about on different boards.

Not sure whether there is a TSB aout it or not, but that's most likely your problem.

TS

 

My serpentine belt was just changed recently because it squealed really bad. It got embarassing to drive around like that.

 

I believe GM put out some sort of service bulletin for this..its a little over $100 to have a GM dealer fix it....it happens in some of thier trucks too. My 99 sounds like a flock of sick birds at idle right now....I definitely need this fix

 

You know what's really odd? My car isn't doing it anymore or it's just BARELY making the noise.

 

My 2000 Silverado does it too. It sounds like the bearings in the clutch fan.

 

Same thing happened to me. It sounded really bad for a while, and then it would go away. A couple weeks later the sound would come back. Finally I got sick of it and changed the belts.

 

I've got the exact same problem. Sometimes it sounds god awful, other times nothing at all. I also sorta have the "blower" noise too.

Should I plan on getting the idler pulley replaced first, and then going from there if the problem continues?

 

Wow, this post came back from the dead.

I never fixed the sqweak and it just went away.

 

Used the search feature.

Don't be fooled by the belt. We've had the car for like 3 years. Had the belt replaced twice, and the problem was fixed. It came back again like 8 months later. Now I think I'll try getting something else replaced.

It makes me embrassed too Jilly

 

Wow, this is funny, I was just talking to the wife about mine doing this! It sound soooo uncool! I do have a extened warr, it will be in for service soon. I'm too worried about the water pump freezing up and tossing my belts!

 

Mines doing the little sqweaking noise to. I did the ghetto thing for now and sprayed some PAM cooking spray on it and it stopped lmao. Only does it here and there now. Before it was a little worse, like when I went and picked the car up. That sqweakand the piston/valve whatever tapping made it sound like crap but it runs and runs good right now. Have had no problems out of this car.

 

Not worried about tossing a belt putting PAM on it?