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Subject: 1999 Silverado Sqeal From Under Hood

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arcticcatk1500 User is Offline

Bone Stock
Posts:25

10/09/2008 11:14 PM
When I turn on my air conditioning and i accelerate, there is a loud sqealing noise that is coming out from under my hood. It also happens when my heat is on and is on the window defrosting mode. I think it has to do with the air compressor or something in that area. Does anyone have any suggestions or has anyone else had this problem...Thanks

Street Queen
Posts:117

10/09/2008 11:18 PM
AC - It is very likely your AC compressor. When you turn on the defrosters the AC Compressor automatically kicks on. Needless to say - is also comes on when you turn on the AC. You can tell by looking when it comes on. If you watch it while the engine is running you will see the compressor engage and disengage. The drive that the belt is turning will start and stop turning.

arcticcatk1500 User is Offline

Bone Stock
Posts:25

10/09/2008 11:29 PM
Thanks for the quick response... I thought thats what it was, i just wanted to hear it from someone else before i buy the compressor

ChevyMan0784 User is Offline

Lift & Lockers
Posts:699

10/10/2008 12:04 AM
Check your belt for cracks and glazing. That would be what the squeal is, unless the bearings in the compressor are going out. Which is possible.

gimmie fuel gimmie fire gimmie that which I desire-James Hetfield Never give an Irish man good cause for revenge. Guns dont kill people, but they sure help!! 98% OF AMERICANS SAY 'OH S*t' BEFORE GOING IN THE DITCH ON A ICEY ROAD. THE OTHER 2% ARE FROM ALASKA, AND THEY SAY, 'HOLD MY BEER AND WATCH THIS

pmipmatt73 User is Offline

Street Queen
Posts:115

10/10/2008 3:33 PM
yeah check your belt first. it's cheaper than an ac compressor, easier to fix, and it could be the problem. the ac could be adding more tension on the belt(since it has to turn that compressor over) making it squeak.

Forum Admin, Magazine Editor

Rock Star
Posts:2375

10/10/2008 4:15 PM
Agreed... an old belt that has been glazed from heat can cause the squeal. RW

Rick Webster Editor, 4X4REVIEW.COM - A Tork Media, Inc. Publication - - - - - - - - - - - - - - - - - - - - - '74 FJ40 Land Cruiser "Measure once, cut twice"

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