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Click on image for the lowdown. 
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| | | Forums66 Topics128,020 Posts1,055,345 Members48,419 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#86976 09/03/2002 11:40 PM | Joined: Sep 2002 Posts: 158 knuckle head | | knuckle head Joined: Sep 2002 Posts: 158 | The alternator hums when it doesn't know the words.Humming may be a result of normal high output due to a heavy load.An alternator with a bad diode will hum.If one diode had failed, the volt meter could show 14 volts, but the battery will eventually discharge. | | |
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