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Click on image for the lowdown. 
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| | | Forums66 Topics128,075 Posts1,055,916 Members48,429 | | 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: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | some about the GMC serial numbers, there is a 250 model, but haven't heard of a 240 model, and the leading letter for '56 was X.... 55-59 GMC shop manualBill | | |
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