Any1 familiar with dual tank gauge wiring? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Crabass · 09-15-2008, 02:43 PM

I have an '87 Silverado with a 4.3 and dual fuel tanks. The passenger side tank has stopped showing fuel level on the gage, the level reads the same as the driver side when you switch tanks from the driver side to the passenger side. My Haynes manual is no help. Anyone know the fuel gage wiring scheme for this truck? Thanks.

**Corts60** · 09-22-2008, 12:25 AM

Those rocker switches go out all the time in the dash. I would replace that and go from there...

James McClure · 09-23-2008, 08:29 AM

Crabass. The fuel level senders are wired to the tank switching valve first then up to the guage. ALL the switch does is tell the valve which tank to use. I just replaced mine (both units) and they are available from Chevy. Check all wireing carefully before replacing anything, especially the pink wires from the senders to the valve and back to the wireing harnace. jim

09-15-2008, 02:43 PM	#1
Crabass Registered User Join Date: Nov 2006 Location: Virginia's Eastern Shore Posts: 91	Any1 familiar with dual tank gauge wiring? I have an '87 Silverado with a 4.3 and dual fuel tanks. The passenger side tank has stopped showing fuel level on the gage, the level reads the same as the driver side when you switch tanks from the driver side to the passenger side. My Haynes manual is no help. Anyone know the fuel gage wiring scheme for this truck? Thanks.

09-22-2008, 12:25 AM	#2
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,689	Re: Any1 familiar with dual tank gauge wiring? Those rocker switches go out all the time in the dash. I would replace that and go from there... __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(winter unit)https://67-72chevytrucks.com/vboard/...25#post8900725

09-23-2008, 08:29 AM	#3
James McClure One shot, one kill. Join Date: Dec 2007 Location: Saratoga Springs NY Posts: 859	Re: Any1 familiar with dual tank gauge wiring? Crabass. The fuel level senders are wired to the tank switching valve first then up to the guage. ALL the switch does is tell the valve which tank to use. I just replaced mine (both units) and they are available from Chevy. Check all wireing carefully before replacing anything, especially the pink wires from the senders to the valve and back to the wireing harnace. jim __________________ 1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shotJim or Paladin whichever you choose.



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