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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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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: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Something is not grounded.
Try running a wire from a clean/good ground to a sender attachment "screw" at the tank (to see if a ground is the problem). I sometimes run a "test" wire from a sender attachment screw all the way back to the ground terminal on your battery (negative terminal for a Chevrolet; positive terminal for a GMC).
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