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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!
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| | | | Joined: Mar 2012 Posts: 34 'Bolter | | 'Bolter Joined: Mar 2012 Posts: 34 | I have a 55 second series. When I purchased the truck the prior owner moved the fuel tank to the back of the truck under the bed and changed the tank to a 34 gallon size. The fuel gauge works, however, will only register half full when it is completely full. I guess there is no easy fix for this and most likely will have to remove the bed so that I can change or reconfigure the fuel sensor. Does someone have a better idea or an easier fix? Thanks, Pete | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | I would be more concerned if the gauge read 1/2 full when the tank was empty. Run it fairly dry and drop the tank. No easy fix I know of.
😞
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
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| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | | | | | | Joined: Jan 2016 Posts: 1,101 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 1,101 | I have the opposite problem (sort of). I did double check the ohm reading. My new sending unit is rated at 30 ohms and the new 12v gauge I bought is also rated at 30 ohms. When I fill up the needle buries all the way to the right past the full mark. It goes at least 1/4 to half a tank distance past the full mark. The strange thing is that once my fuel level gets down to about 3/4 of a tank the needle is reading close to the 3/4 mark. When I am sitting on 1/4 tank it is darn close to right. I test this theory by checking how many gallons it takes to fill the tank. Based on the capacity listed in the owners manual the amount of fuel needed to fill the tank is very close to what you would expect sitting at a 1/4 tank on the gauge. This is a gremlin I just live with because on the low end I know it is close to accurate. | | | | | Joined: Jul 2010 Posts: 592 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 592 | I was having a similar problem with the stock set up in my '57 3600. When the tank was full, it would only read 3/4. More of an annoyance than anything, but it was an easy fix.
With the tank completely full, I pulled the sending unit and carefully bent the float arm down until the gauge read just a touch over the white full dot. I did the bending in small increments, reinstalling and testing each time until I got it right. I did this with a disconnected battery and only reconnected it when I was checking it.
My gauge is now accurate. I just need to remember that empty really means empty!
If you can get to your sending unit without removing the bed, perhaps you can do something similar.
Matt | | | | | Joined: Feb 2004 Posts: 80 Shop Shark | | Shop Shark Joined: Feb 2004 Posts: 80 | Great tip! I will have to remember this one... | | |
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