Chirping sound

[RyanbabZ71]

I noticed a few weekends ago when i started my truck i have a chirping sound coming from under the hood.

 

Just wondering if anyone had a problem like this.  I noticed it also today.  Both times i heard it it was about 40-50 degrees out (sat all night)

 

I am thinking it could be a belt?

[chevy4x4trucks]

have you been parking it outside over night?   My truck will do that if I leave it outside over night and the temp drops.  I just figured it was condensation on the belt or something.  I know my brakes will squeak pretty bad sometimes when left out over night.

[RyanbabZ71]

my truck is outside 24/7 and has been since i got it

 

i know the brakes squeak and such in the morning.  Never noticed this chirp under the hood though guess it has something to do with the temp changes

[siume99]

I hear that same chirping sound too (for the past week its been in the 30-50s).  My truck is out 24/7, taking whatever central IL can throw at it.  I wish I had a garage, or at least a canopy.  I believe it is the belt also.  I have no idea on how to cure the problem.  GM suggests not spraying the belt.  I'm not concerned with it.  I think it is just a condensation thing.  Should a truck chirp though?  I nice growl would be nice!

[GreenRado]

Pretty sure it's moisture on the belt.  I have the same issue on cold and/or damp mornings (it's out 24/7 also), but not on all damp mornings.  It goes away after a few minutes, so I'm not worried about it either.

 

I would definitely stay away from any belt "dressing".  I had big problems with this on a serpentine belt about 10 years ago, and ended up replacing the pulleys and tensioner  :angry: .

I mentioned the chirping to a service manager, who seems to know his stuff, and he advised me to not spray anything on it.

[RyanbabZ71]

My moms 00 blazer had a similar noise with a knock.  My dad took it in and they replaced the serpentine belt.  Noise gone.  Hers is garaged all the time and not driven very many miles either

[GreenRado]

Oddly, my chirping hasn't gotten worse over the last 2 years, and even did it at about the same rate after a new belt was installed.  Who knows!?

 

Yeah, but I can see where belt wear might make it more likely as well, moisture or otherwise.  Over time the v-grooves get pretty slick.

[siume99]

I only have 16,000 miles on mine (bought in April).  I haven't been through cold stuff with it yet, nor the snow.  I WANT SNOW!!!!!!   My Silhoutte did that same squeeking noise.  We put dressing on it since it was near the end of its 206,000 mile life anyway.  Squeek left for a week or so, then it came back even more viscious.

[RyanbabZ71]

MINE HAS ALMOST 22k bought april 00.  Been through 1 winter and 2 blizzards so far.

[chevy4x4trucks]

if replacing the belt doesn't fix it what about the belt tensioner?

[silverado man]

mine does it too but only in the mornings first start up.  I was always just thinking that it was just moisture on the belt.

[Kansas Kid]

Mine does that occasionally in cold weather, and even though it isn't a new one like your guys.  And I know for a fact mine was the belt, because I checked under the hood one morning when it made that noise.

 

btw, like was mentioned above, do not but belt dressing on it.  I thought it would take care of the problem above but it only made things worse.  I ended up replacing the old belt with a high quality Gates belt, and that took care the chirping.