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Click on image for the lowdown. 
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| | Forums66 Topics128,050 Posts1,055,757 Members48,426 | | 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!
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| | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Ken,
I have no first hand knowledge but have looked at some wiring diagrams. The '29 and '30 rigs were negative ground and the '34 was negative ground so I'll go out on a limb and say that the '33 was probably negative ground too!
I believe Chevrolet did use a positive ground but it was in the very very early years, and then only for a year or two.
Stuart | | |
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