....[q.uote=EdPruss]My ‘55 GMC 6 cyl. Is still 6V.
....Ed[/q.uote]
I think GMC hung on to 6v longer than Chevy.
I always thought it strange that all the GM lines did whatever they wanted.
Cadillac switched to 12v in 1953. Small (1/2 to 1 ton, maybe more) kept 6 volt positive ground in 2nd series '55 models IF the truck was stick shift AND 6 cylinder. All Hydra-Matic models and all V8 equipped were 12 volt negative ground.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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