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Click on image for the lowdown. 
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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: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Here is my list.
Chevrolet called them "underpans".
The front vertical part is called "extension".
This is a six cylinder list only.
Flywheel Under pan 0.679
1937-48 Passenger 839335
1949-62 Passenger 3688221
1937-53 truck 838438
1954-55 1st truck 3702830
1954-62 truck (1954-55 1st, w/HD clutch) 3725088
Extension
1937-39 Passenger 838484
1940-48 Passenger 839131
1949-54 Passenger 3688218
1955-62 Passenger 3836317
1937-39 truck 838483
1940-62 truck 839180
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