99 GMC making whistling noise : Exhaust

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99 GMC making whistling noise

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11 posts • Page 2 of 2 • 1, 2

Re: 99 GMC making whistling noise

by lzn197 » Mar 11 2011, 12:50pm

Could it be the alternator or some other belt driven accessory? You can remove the belt for a quick test as you idle it in the driveway but don't let it run like that Too long or it will overheat due to no water pump circulation.

Gordon
2004 Chevrolet Silverado Extended Cab Z71
Semi-retired Master Mechanic

lzn197: ASE Certified; Auto 4WD Mode [L3]; Posts: 1655; Topics: 6; Images: 20; Blogs: 16; Joined: Apr 01 2010, 3:45pm; Years of membership:; Location: Central Michigan; Year: 2004; Make/Model: Chevrolet Silverado; Extra Info: K1500 5.3L Z71 EX; Group Membership:
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Exhaust Forum
Topics regarding exhaust systems beginning at the headers down the pipes and through the catalytic converter and the mufflers and exhaust tips. We can also discuss emissions, performance cat back exhausts, or any exhaust related topics.
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