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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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#20773 06/22/2004 9:32 PM | Joined: Nov 2000 Posts: 1,966 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,966 | You might try Old GMC Trucks website for more technical info about your pickup. Also a search of this forum of post relating to SM420 might yield more useful info. I also like this site for good info about this transmission. Good luck 
Professional Novice
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