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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,036 Posts1,055,454 Members48,422 | | 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!
| | 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!
| | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the radios that need constant power to maintain program memory use your battery, not their own, with a unswitched source - as the speedo only needs switched power, there must be a writable memory chip in the control box, just like the RAM on your 'puter
Bill | | |
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