Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Silverado & Fullsize Pick-ups
Sign in using an external account
Register Forgot Password?

Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by: Bakliner

LinkBack Thread Tools
Old 01-24-2007, 11:59 PM
Join Date: Jan 2007
Posts: 8
Default Awful Squealing from Compressor!!

I have a new body style 1999 Z71. Last week, when I turned on the defrost, when the compressor kicks in...it makes the loudest shreak you have ever heard! I don't know if moisture has played a problem...but it started doing it after a week straight of rain here in Central Ohio. Any suggestions? Should I try to spray the face of the compressor with lube to try and see it it wil help?
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
Old 01-25-2007, 01:07 PM
Join Date: Jan 2007
Posts: 8
Default RE: Awful Squealing from Compressor!!

this makes since, two guys here at work asked my how many miles I had on the Belt...I have put at least 50,000 on it...but it may be OEM with the total of 120,000...they said that's probably the problem...it is sqwealing when the load gets on it from the compressor clutch engaging. I will try that remedy first

Reply With Quote
Old 01-25-2007, 07:25 PM
CF Junior Member
Join Date: Jan 2007
Posts: 32
Default RE: Awful Squealing from Compressor!!


I've got a 2003 Suburban (Z71... haha) and i've got the same thing going on. Its my mother's daily driver so i haven't had the chance to check it out. Start with the belt... its most likely there. Take it off and check the pulleys too. I had one freeze up from time to time on the compressor. It its the belt... go with a Gatorback much better and cheaper than OEM.

-- Rick
"White Lightning"
2006 3500 Silverado CrewCab LBZ Duramax
500hp+ 1000tq+
5.4 (0-60) 14.2 (1/4 mile)

Custom performance tunes
Headlight mod (all on in Hi)

Email for tunes, filters, and diesel performance all at REDICULOUSLY low prices!!
Reply With Quote
Old 01-29-2007, 04:00 PM
Join Date: Jan 2007
Posts: 8
Default RE: Awful Squealing from Compressor!!


I have not changed the belt yet...but that seems to be the bad egg...at idle, it doesn't make the noise...and if you rev the engine to make it make the noise..as soon as you let off gas...goes quiet...I am sure it is the belt and nothing more serious than that...I hope!
Reply With Quote
Old 01-30-2007, 01:54 PM
Join Date: Jul 2005
Location: Tucson, AZ United States
Posts: 48
Default RE: Awful Squealing from Compressor!!

When you take your belt off, spin the idler pulley, if you can hear any rough noise itmost likelybe bad. They are known to go bad and sometimes its hard to tell where the noise is coming from. It can also make a bad beltscreech.
Good Luck, Dondobe
Reply With Quote
Old 02-02-2007, 02:23 AM
Join Date: Jul 2006
Posts: 504
Default RE: Awful Squealing from Compressor!!

If you start it and it is squealling you can spray some wd40 on the belt. If it stops it's the belt. If it helps but dosen't stop change the belt, or you may have something else contributing to it.
Reply With Quote
Old 02-06-2007, 08:55 AM
Join Date: Jan 2007
Posts: 8
Default RE: Awful Squealing from Compressor!!

Changed both belts...the compressor belt was checked a little....main serpintine was not bad...but the bad egg that was contributing more than anything was the tensioner for the compressor belt was locked i n the position where it wasn't providing tension to the belt...took it off and removed the dust cap...lubricated and worked it back and forth till it freed up...good to go now!!!
Reply With Quote
Old 02-06-2007, 08:55 AM

1500, 2000, belt, chevrolet, chevy, clutch, compressor, defrost, s10, silverado, sqeeling, squeaking, squealing, squeals, stop, stops

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Join Chevroletforum
Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 09:18 AM.

Internet Brands, Inc.

Emails Backup