Fuel Gauge issue 82 C-10 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bacca · 08-14-2017, 07:56 AM

The fuel gauge on my 1982 C-10 only reads from half to empty. I have replaced the tank (small rust hole) and the sending unit. Wiring and the ground seem fine. Next obvious step is to replace the gauge but I'm not into replacing parts without knowing they are actually needed. I only did the sending unit because the tank was out.

Is there anything else I should be checking before ordering a new gauge?

PS: this truck also has a A/market electric fuel pump. I don't know if that could be a concern or not.

Thanks Bacca

**old Rusty C10** · 08-14-2017, 06:19 PM

when mine did that it was a wiring issue my 82 with dual tanks has been a horror show with the gas tank wiring grounds loose etc

Bacca · 08-15-2017, 07:09 AM

Thanks Old Rusty,

I only have a single tank and I've ruled out any wiring harness or ground issues.

Bacca

CSHADES · 08-15-2017, 09:15 AM

With the key on engine off, unhook the sending unit wire--with it unhooked the gauge should read over full. With the wire grounded the gauge should read empty. I personally have never had a problem with the gauge itself on one of these trucks. It has always been a sender or wiring issue.

Rich84 · 08-15-2017, 09:45 AM

My gauge always worked fine. I changed the sending unit for my LS swap now it only goes to 3/4 when full..When its on E it still has 1/4 tank.
I think the aftermarket sending unit is to blame. (Spectra)

08-14-2017, 07:56 AM	#1
Bacca Registered User Join Date: Aug 2017 Location: Euclid, Ohio Posts: 44	Fuel Gauge issue 82 C-10 The fuel gauge on my 1982 C-10 only reads from half to empty. I have replaced the tank (small rust hole) and the sending unit. Wiring and the ground seem fine. Next obvious step is to replace the gauge but I'm not into replacing parts without knowing they are actually needed. I only did the sending unit because the tank was out. Is there anything else I should be checking before ordering a new gauge? PS: this truck also has a A/market electric fuel pump. I don't know if that could be a concern or not. Thanks Bacca

08-14-2017, 06:19 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,276	Re: Fuel Gauge issue 82 C-10 when mine did that it was a wiring issue my 82 with dual tanks has been a horror show with the gas tank wiring grounds loose etc __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

08-15-2017, 07:09 AM	#3
Bacca Registered User Join Date: Aug 2017 Location: Euclid, Ohio Posts: 44	Re: Fuel Gauge issue 82 C-10 Thanks Old Rusty, I only have a single tank and I've ruled out any wiring harness or ground issues. Bacca

08-15-2017, 09:15 AM	#4
CSHADES Registered User Join Date: Nov 2015 Location: portage wi Posts: 503	Re: Fuel Gauge issue 82 C-10 With the key on engine off, unhook the sending unit wire--with it unhooked the gauge should read over full. With the wire grounded the gauge should read empty. I personally have never had a problem with the gauge itself on one of these trucks. It has always been a sender or wiring issue.

08-15-2017, 09:45 AM	#5
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,668	Re: Fuel Gauge issue 82 C-10 My gauge always worked fine. I changed the sending unit for my LS swap now it only goes to 3/4 when full..When its on E it still has 1/4 tank. I think the aftermarket sending unit is to blame. (Spectra)



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