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Click on image for the lowdown. 
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| | Forums66 Topics128,051 Posts1,055,732 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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| THANKS!
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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| | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Back in the 80's and early 90's we used programmable speedometers that programed with a series of DIP switches in our trucks. These guys still sell and support them . http://www.zepco.com/ As far as that goes, we probably have some laying around. With electronic engines the ECM now sends signals to the Speedo. | | |
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