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#1587056 09/10/2025 7:22 PM
Joined: May 2019
Posts: 226
J
'Bolter
'Bolter
J Offline
Joined: May 2019
Posts: 226
All

Is a 27 Chevy truck positive or negative ground?

Helping a friend get this restored truck running and then it’s up for sale if anyone is interested

Thanks

Joined: Oct 2021
Posts: 5,684
O
'Bolter
'Bolter
O Offline
Joined: Oct 2021
Posts: 5,684
Negative.


1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
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J
'Bolter
'Bolter
J Offline
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Thank you

Joined: Aug 2010
Posts: 389
T
'Bolter
'Bolter
T Offline
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My old '47 was positive ground. I thought everything was, til the mid 1950s and 12 volt.. interesting.


1965 C60 school bus | 1967 GMC 6500 school bus
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O
'Bolter
'Bolter
O Offline
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I thought only GMC was (+) until then. I believe Chevrolet trucks were (-) ground since day one.

I just looked up a 1927 Chevrolet wiring diagram and it definitely shows a (-) ground


1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
Joined: Aug 2005
Posts: 6,383
T
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Joined: Oct 2021
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O
'Bolter
'Bolter
O Offline
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Posts: 5,684
They are. All Chevy trucks were negative ground from their inception


1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)

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