Question about Chevrolet Silverado 2500

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Can the fuel selector switch in the cab of a 1977 C20 Chevy truck be wired backwards?

I put in 25.00 worth of fuel in the drivers side tank last night...drove it all of 10 miles after doing so...this morning the truck died on me....after taking it to a repair shop and having them replace the fuel pump and the filter to the carb, the mechanics asked me if I was sure I had gas in the tanks. As far as I knew I did...not much on one side and half tank on drivers side according to my fuelk guage which was not working when I purchased the truck. Trouble shooting that problem I found along the chassis frame about 8 to 10 inches of wire missing with two ends danglin loose. I then put a jumper wire between the two dangling ends and wallla my guage started working again. Now I'm not sure of my guage working propperly since all it turned out to be was that I ran out of fuel but my guage was showing 3/4 tank on the drivers side or LH of the selector switch inside the cab on the dash. I switched it to RH and the guage feel to I am assuming that if you push the switch at the bottom it should be on the LH tank with the switch noticeable at the top of the actualuy switch and away from the RH...It feels like the selector switch is wired upside down or backwards. Could it be a faulty swittch? but why when tripping the switch does the fuel guage show an empty tank and a fuller tank..I am totaly confused to whict postion the switch is supposed to be on for which tank...pushed in at the bottom for LH or pushed in at top for RH? or vice versa...since the switch under the vehicles is electronic how can I test it to know which tank it is actually currently feeding fuel from?

Posted by Anonymous on


6 Suggested Answers


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  • 2 Answers


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Posted on Jan 02, 2017



  • 5 Answers

SOURCE: Stalls / Dies / dead

ignition coils or control moduals sometimes when the start to go bad get hot then quit working

Posted on Jul 13, 2008


Chuck Brink

  • 54 Answers

SOURCE: I was driving down the road at about 30 mph and the truck died.

Sounds like it could possibly be the inertia switch. Check to see if you can hear the fuel pumps kicking on, if not the check your inertia switch. They are made to shut the fuel pumpa off if the vehicle has an impact or roll over. Sometimes they go bad or the wire connections get corroded. I believe it is located in the kick panel on the passenger side. Hope this helps.

Posted on Jun 16, 2009


  • 1 Answer

SOURCE: fuel gauge not working

Unplug the transfer switch from the dash and clean the contacts. I had a similar problem. rh tank would go max full. works fine now

Posted on Jul 29, 2009


frank thomas wilson

  • 10319 Answers

SOURCE: 1982 chevy truck with dual gas tanks with guage or tank problems

all you need to do is listen to hear the tank switching valve is working. It will make a soft noise under the rear cab section with the key on with the engine off. zif you do hear it sounding the switch your tank unit for that one tank you try to switch to is a fault. Sorry no illustrated diagrams are on hand, just knowledge

Posted on Feb 05, 2010

Gil Nolasco

  • 306 Answers

SOURCE: 1995 nissan pickup truck fuel problem

Fuel injected or carb? Make sure fuel line itself is clear. Some pumps are designed to self regulate (carb systems) some continually pump and a psi regulator sends back the excess fuel back to the tank (fuel inj systems) If the line is obstructed then pump can't deliver fuel fulltime.

If you think pump is not on consistent, try running a dedicated wire through a switch directly to the pump. If it works then you are looking for an electrical fault going to pump. Good luck.

Posted on Mar 10, 2010

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sounds like the fuel tank selector valve is bad, it should be located between the fuel tanks.could just be a wire off so you might want to give it a close check before buying one. and as long as you are under the vehicle you might want to check that it is getting electrical power to the valve/switch.

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I’m happy to assist further over the phone at

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