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Click on image for the lowdown. 
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| | | Forums66 Topics128,035 Posts1,055,564 Members48,426 | | 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: Dec 2003 Posts: 1,144 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,144 | Some GMC's had 6 stud wheels. In any case it appears yours has been changed. I will look at my 48 shop manual and see if there is anything in the numbers that would indicate two speed axle. | | |
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