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Click on image for the lowdown. 
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| | | Forums66 Topics128,089 Posts1,056,356 Members48,442 | | 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: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | Based on your examples it looks like the frames all got the "oh" while the door post tags got "zeros"...It probable never really mattered to GM as they knew the digit following the YEAR was the "plant" and represented a letter, even if it looked like a number. Mike B  | | |
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