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Noisey idler pulley

Arc Burn

By Arc Burn
in 2000-2014 Silverado HD & Sierra HD

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Arc Burn Enthusiast

Arc Burn

Posted
Posted

The upper idler pulley on my 02' 8.1 is driving me nuts,it's loud as hell and doesn't sound impressive to others!I've sprayed wd-40 on the front and back of it and it would quit for a few minutes but then gets loud again,any suggestions or am i buying a new idler pulley?

Arc Burn Enthusiast

Arc Burn

Posted
  • Author
Posted

No,haven't replaced the belt yet,50k and i believe it's original,like i said,i can make the noise stop for a bit when i lube the pulley.

Is this a dealer part or does someone know were i can order one?

Shaners Senior Enthusiast

Shaners

Posted
Posted

I replaced my belt at 17K under warranty. I thought it was the idler pully too, but the dealer changed the belt and the truck has been quiet ever since...

 

My buddy with an 8.1L has changed his belt twice in 30K miles for noise related isuues.

tbyrne Senior Enthusiast

tbyrne

Posted
Posted

First pull the belt off and spin your alternator. Mine was LOUD! I really didn't expect it to be making any noise so I replaced the belt and then the idler. Nice and quiet now :devil:

briano Enthusiast

briano

Posted
Posted

is it making like a chattering noise?? my 98 Z71 started doing that after I replaced the belt on it... like someone said, the bearings in the idler pulley had gone bad and it was just bouncing all over the place. Dealer repair, noise gone for good.

WileE1 Enthusiast

WileE1

Posted
Posted

I just replaced the belt tensioner pulley (is this the same as idler pulley) on my Duramax. It started out as an intermittent chirping and eventually went to a constant chirping sound. Anytime it sat at idle it would sound horrible (Draw back to a duramax I guess had it been a powercroak I would have never heard it) :devil:

 

I could let the truck run and put pressure on the tensioner and it would momentarily stop making the chirping sound.

 

I replaced the tensioner from one at Action Auto Parts and it fixed it. Now it has about 500 miles on it with no problems.

After I got the old tensioner off and really took a look the puley was loose and wobbly so I never thought the belt may be part of the problem?

 

The price at the Stealership for the tensioner was 165.00 the price at Action was 49 bucks. I had a heck of a time finding an aftermarket pulley: Shucks, Autozone, and Napa said they couldn't get one for the 6.6?

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