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Click on image for the lowdown. 
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| | | Forums66 Topics128,110 Posts1,056,255 Members48,437 | | 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!
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#95064 03/16/2006 10:17 PM | Joined: Dec 2005 Posts: 324 Member | | Member Joined: Dec 2005 Posts: 324 | When did GMC change over to 12 volt system? i thought it was 55, but could be wrong.
"It ain't a truck if you can't hose out the cab."
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