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Mod | | | Forums66 Topics128,081 Posts1,056,078 Members48,434 | | 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: Oct 2021 Posts: 6,791 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,791 | I know that it's possible to reverse the polarity simply by switching battery cables. None of the electrical stuff will care except the ammeter.
What needs to be done with the ammeter to allow it to function?
Also, when did GMC switch to (-) ground? Was it when the whole company went to 12v?
A friend of mine has a GMC coach and an Austin taxi that are both (+) ground.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
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