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Click on image for the lowdown. 
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| | | Forums66 Topics128,204 Posts1,057,297 Members48,467 | | 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: Oct 2005 Posts: 275 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 275 | I think the 39 running boards are wider to accommodate the wider rear fender. A good way to tell would be look in a vendors catalog like Jim Carters and see if the 39 running boards have the same part # as the 41-46.
38 original
48 panel
59 stepside
46 in the back forty
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