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Click on image for the lowdown. 
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| | | Forums66 Topics128,041 Posts1,055,479 Members48,424 | | 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!
| | | | Joined: Nov 2010 Posts: 21 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2010 Posts: 21 | Were 55-2 GMC's 6 volt ? Mine is 12v. now...converted who knows when by who know who...some things don't work...
Bear | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | yes, originally 6V - GMC switched in 56, one year later than Chev
Bill | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | That depends on whether the truck came with a 6 or an 8. Sixes were 6V positive ground, eights were 12V negative. In 1956 they all were 12V. | | |
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