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Click on image for the lowdown. 
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| | | Forums66 Topics128,179 Posts1,057,134 Members48,463 | | 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
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Sep 2003 Posts: 23 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 23 | if it's a 56 and 1 1/2 ton its 12 volt. the medium duty trucks were all supposed to be 12v that year.
John
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