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73-87 Chevy _ GMC Trucks => Interior & Equipment => Instrumentation => Topic started by: bigtee72 on July 11, 2008, 09:08:32 am

Title: Fuel gauge
Post by: bigtee72 on July 11, 2008, 09:08:32 am

Hey fellas,
     I have a '74 chevy full size pickup. I just replaced the fuel tank sending unit because my gauge wasn't reading true. Only to find out it was the gauge. Not the unit. Seeings no junk yards around here have a fuel gauge for my truck, I have to buy a sunpro from Whitney( I know I know). Would anybody out there have an original that actually works and or how hard is it just to hook up the one I bought?

Title: Re: Fuel gauge
Post by: Captkaos on July 11, 2008, 09:10:23 am

You should be able to find a fuel gauge that works.  Did you test everything before taking it apart?

Title: Re: Fuel gauge
Post by: bigtee72 on July 11, 2008, 09:18:00 am

No sir I did not. Could you please tell me exactly what needs to be tested. I'm not really smart at these kinds of things so I'm getting my brother to help me. I just thought it was either a bad sending unit or gauge.

Title: Re: Fuel gauge
Post by: zieg85 on July 11, 2008, 04:20:23 pm

If the newer style 85-86 will work I have several you can choose from.  FREE!!!!! I have so many laying around...

Title: Re: Fuel gauge
Post by: bigtee72 on July 11, 2008, 11:22:02 pm

Does anyone know if an '85 - '86 fuel gauge will work in a '74 dash. I'd really appreciate one of those gauges if it does. Thank you very much zieg

Title: Re: Fuel gauge
Post by: ccz145a on July 11, 2008, 11:33:09 pm

It will work. It will have a different font and say "Unleaded Fuel Only", though.

Title: Re: Fuel gauge
Post by: bigtee72 on July 13, 2008, 12:51:20 pm

Hey zieg,

 I'd like one of those fuel gauges. Just let me know what I have to do to get one.

Title: Re: Fuel gauge
Post by: eventhorizon66 on July 13, 2008, 01:22:30 pm

If it has dual tanks it could also be a short in the switching valve.  That's what it was on mine.  Of course it's always the most expensive part that needs replacing with my truck >:(.

Title: Re: Fuel gauge
Post by: bigtee72 on July 13, 2008, 01:39:59 pm

It's not dual tanks. Good thought though. The gauge would float back and forth teribbly. Now it just kinda sits on the full mark. When I dropped the tank to put the new sending unit in I noticed I had less than a 1/4 tank of gas. I know what you mean about the expensive parts. Mine always seem to be the pain in the rear ones. >:(

Title: Re: Fuel gauge
Post by: gztoyz on October 07, 2008, 02:46:22 pm

i know this is an old thread but im hhaving a prob with my gas gauge and would like to know if anyone had the same prob and how they fixed it. it wont go all the way full. i know the truck is but the gauge will read about half and will stay there till its at half and then go down like normal. i do have daul tanks. thanks

Title: Re: Fuel gauge
Post by: zieg85 on October 07, 2008, 06:29:26 pm

If it acts the same way on either tank chances are it is the gauge.

Title: Re: Fuel gauge
Post by: gztoyz on October 08, 2008, 08:25:35 am

thanks im going to go buy a gauge and hope it works im tired of running out of gas. lol

Title: Re: Fuel gauge
Post by: idahok1085 on October 10, 2008, 12:21:04 am

Mine is doing the same thing, I switch tanks and it stays at 1/4 on the gauge. even tho one take is full and one is empty. Do you still have a extra gauge?