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Old 05-06-2009, 03:25 AM   #4
heavychevy79
Cheyenne Super
 
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Join Date: Nov 2008
Location: Dallas Texas
Posts: 545
Re: Loud squeal on startup and sometimes while driving

The belt is slipping on the alternator pulley, then goes away when the battery
voltage comes back up.
Take some sandpaper to the pulley and rough it up, and change the belt too if it looks badly glazed.
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