Famous Gas Gauge problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

82GMC4X4 · 07-05-2007, 09:13 PM

I have searched and searched on the board and still couldnt find what I was looking for.

I have an 82 with the tual tank setup. The original owner had problems with the tanks and decided to only replace the one tank on the passenger side. The gas gauge how ever does not work. I have dropped this tank every weekend since I have gotten it ( I could probly do it blindfolded now). sender is grounded, (sender is less then a year old so I doubt there is a problem there) sender is hooked up. The only thing I can think of now is maybe something was not connected to the gauge itself. The tank switch has been disconnected, and no gas lines go to the other tank, although it is still there. Does anyone have any wiring diagrams for the gauges and sender wires?

boxrodz · 07-05-2007, 11:38 PM

82GMC -

Here's a thread in a thread that you can pull on to see the wiring diagram ...
http://67-72chevytrucks.com/vboard/s...highlight=fuel

And, here's more threads within a thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=219395

And more,
http://67-72chevytrucks.com/vboard/s...d.php?t=179942

Is your fuel tank selector valve working?

82GMC4X4 · 07-06-2007, 02:22 AM

i wouldnt know cause it was disconnected because I only haveone working tank. The tank was plumbed straight to the fuel pump? haha the gas lines were totally removed the tank that doesnt work.

knightlife · 07-06-2007, 07:15 AM

do a wire check from the tank switchover on the dash to the back of the gauge bezel... thats about all I can think of from what you told meh...

boxrodz · 07-07-2007, 02:40 AM

Did the wiring diagram help?

If the fuel tank selector valve is not present, then maybe the fuel gauge was never rewired directly to the sending unit.

82GMC4X4 · 07-07-2007, 05:14 AM

Thats what I was thinking, thanks for the diagram, I havent had the chance to tinker with it yet, ill let you know what happens

wedgemon · 07-07-2007, 12:25 PM

These trucks were set up with a default tank; set to switch over if there's a short in the tank switch system. On mine(1980K10) it's the Right tank. You may think you're on one tank when in fact you are on the default.

Worth investigating...

- Dave

jokersbowtie · 07-07-2007, 07:14 PM

Hmmm i only have a single tank. fill it up and it goes to 3/8 is this the sending unit or the guage?

07-05-2007, 09:13 PM	#1
82GMC4X4 Registered User Join Date: Jul 2007 Location: Regina, Sk, Canada Posts: 10	Famous Gas Gauge problem I have searched and searched on the board and still couldnt find what I was looking for. I have an 82 with the tual tank setup. The original owner had problems with the tanks and decided to only replace the one tank on the passenger side. The gas gauge how ever does not work. I have dropped this tank every weekend since I have gotten it ( I could probly do it blindfolded now). sender is grounded, (sender is less then a year old so I doubt there is a problem there) sender is hooked up. The only thing I can think of now is maybe something was not connected to the gauge itself. The tank switch has been disconnected, and no gas lines go to the other tank, although it is still there. Does anyone have any wiring diagrams for the gauges and sender wires?

07-05-2007, 11:38 PM	#2
boxrodz Until Seventy Times Seven Join Date: Feb 2005 Location: Rocky Mountain Front Range Posts: 1,301	Re: Famous Gas Gauge problem 82GMC - Here's a thread in a thread that you can pull on to see the wiring diagram ... http://67-72chevytrucks.com/vboard/s...highlight=fuel And, here's more threads within a thread: http://67-72chevytrucks.com/vboard/s...d.php?t=219395 And more, http://67-72chevytrucks.com/vboard/s...d.php?t=179942 Is your fuel tank selector valve working? __________________ boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...

07-06-2007, 02:22 AM	#3
82GMC4X4 Registered User Join Date: Jul 2007 Location: Regina, Sk, Canada Posts: 10	Re: Famous Gas Gauge problem i wouldnt know cause it was disconnected because I only haveone working tank. The tank was plumbed straight to the fuel pump? haha the gas lines were totally removed the tank that doesnt work.

07-06-2007, 07:15 AM	#4
knightlife Dark Heart Motorsports Join Date: Apr 2007 Location: 29404 DKFX Posts: 683	Re: Famous Gas Gauge problem do a wire check from the tank switchover on the dash to the back of the gauge bezel... thats about all I can think of from what you told meh... __________________ How Deep Can YOU Bleed..? 1985 Chevy Blazer K5- 6.2 N/A, 400 turbo trans CUCV, 12v converted... a new chapter 2005 GMC Sierra Crew Cab 6.0 powwwaa!!! custom jumpseat install w/ captain seats, Hypertech tuner, MSD Blaster Coils, CB and twin antenna's, all electric interior, touch screen in dash. custom center console, with jump seat replacing original console. 1500 HD!

07-07-2007, 02:40 AM	#5
boxrodz Until Seventy Times Seven Join Date: Feb 2005 Location: Rocky Mountain Front Range Posts: 1,301	Re: Famous Gas Gauge problem Did the wiring diagram help? If the fuel tank selector valve is not present, then maybe the fuel gauge was never rewired directly to the sending unit. __________________ boxRODz 1983 C10 SWB Fleetside When two halves is gone, there's nuthin left. Two nothings is nuthin. That's mathematics son. You can argue with me but you can't argue with figures. Two half nothings is a whole nuthin...

07-07-2007, 05:14 AM	#6
82GMC4X4 Registered User Join Date: Jul 2007 Location: Regina, Sk, Canada Posts: 10	Re: Famous Gas Gauge problem Thats what I was thinking, thanks for the diagram, I havent had the chance to tinker with it yet, ill let you know what happens

07-07-2007, 12:25 PM	#7
wedgemon Registered User Join Date: Jul 2004 Location: Spanish Springs, NV Posts: 1,171	Re: Famous Gas Gauge problem These trucks were set up with a default tank; set to switch over if there's a short in the tank switch system. On mine(1980K10) it's the Right tank. You may think you're on one tank when in fact you are on the default. Worth investigating... - Dave __________________ 2003 Silverado K1500 Z71 - Arrival Blue 1973 K5 Cheyenne Blazer 350/TH350/NP203 Kids Trucks:92 K1500 Blazer 5.7/700R4 4" lift. RETIRED: 1980 Scottsdale 4x4 Founding Member: "TILT WHEEL BELLY." Club Last edited by wedgemon; 07-07-2007 at 12:26 PM.

07-07-2007, 07:14 PM	#8
jokersbowtie Registered User Join Date: Jul 2007 Location: Louisiana Posts: 74	Re: Famous Gas Gauge problem Hmmm i only have a single tank. fill it up and it goes to 3/8 is this the sending unit or the guage?



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