Had a local shop take a look and they thought it was the tensioner pulley. I don't think it's ever been changed and I'm at ~116,000mi. So, swapped it out, and voila — no more squeak 
Accessory belt / pulley chirp - 2006 3.5l Colorado
2006 3.5l Colorado. Replaced a squeaky serpentine belt and a new sound emerged. Here's a video:
The squeak sounds awfully dry/bad — but when I started it up this morning (about 15F colder than when I filmed) the sound didn't appear.
Thinking it might be a pulley bearing going bad?
Belt tension felt OK I think - was able to turn it about 70-80 deg. Seems aligned on pulleys fine. But I did notice the tensioner pulley had a slight bounce when I first installed the new serpentine belt... don't notice it as much now.
The squeak sounds awfully dry/bad — but when I started it up this morning (about 15F colder than when I filmed) the sound didn't appear.
Thinking it might be a pulley bearing going bad?
Belt tension felt OK I think - was able to turn it about 70-80 deg. Seems aligned on pulleys fine. But I did notice the tensioner pulley had a slight bounce when I first installed the new serpentine belt... don't notice it as much now.
1 - 2 of 2 Posts
1 - 2 of 2 Posts
Chevy Colorado & GMC Canyon
ColoradoFans.com is the best forum for the Chevy Colorado community to discuss the truck’s reliability, diesel or transmissions problems and more.
Full Forum Listing
Top Contributors this Month
View All
_Montana_
369 Replies
DieselDrax
344 Replies
gherbert
310 Replies
