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Click on image for the lowdown. 
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| | | Forums66 Topics128,103 Posts1,056,534 Members48,448 | | 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 | The GMC 5-window was an option and was only available on the big trucks. This configuration helped stiffen the cab and reduce flex. Most of these cabs also had the door alignment wedges which prevented the door from opening when the frame twisted and flexed. Mike B  | | |
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