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Click on image for the lowdown. 
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8 members (GRNHydra, mason86, klhansen, Gray_Ghost, mick53, Bill Hanlon, Otto Skorzeny, Hawkman),
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Global Mod,
Mod | | | Forums66 Topics128,069 Posts1,055,886 Members48,428 | | 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!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2004 Posts: 1,312 'Bolter | | 'Bolter Joined: May 2004 Posts: 1,312 | OK..battery fully charged - getting 12.8v. Truck running getting 13.8 to 14.2v. Took it out for a run / checked it on return, getting 12.6v stopped / running readings bouncing between 6v.and 9v. Wondered if electric fan was drawing too much ( fused @ 15A ), so I pulled the fuse to shut fan down - got 14v / plugged fuse back in to run fan - got 14v !
Alternator is rated at 80A. Is that rating calculated at idle or at " full speed " . Is it possible when fan is running - maybe taking 10 or 12 Amps, that Alternator is not large enuf ?
Geez I hate electrical stuff ! *g*
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