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Re: new noise in my engine!
Before you go putting wd40 on your alternator I would check the idler and tensioner pulleys. These tend to go bad on these trucks and are easy to replace. Just take the belt off, squirt some wd40 on their bearings while spinning the pulley. Put the belt back on and start-r-up. If that doesn't work then you can go to the alternator. Good luck man.
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