Fuel Gauge stuck at 1/2 tank - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72tutone · 10-29-2010, 10:33 PM

Guys I just took out my dash bezel to replace some bulbs, and touch up the needles. Since I have put it back int the gauge needle is stuck at 1/2 tank.
I put 20$ worth in today, and the needle didnt move. I didnt want to take the chance in running out while I was out on the road, however the needle didnt move.

Everything I have read on the boards say there is tan wire going to 16pin connector or so going into the electrical board on the back. Is there anything on the back of the gauge that needed to be hooked back up?

72freak · 10-29-2010, 11:01 PM

sending unit?

DaSchlange · 10-29-2010, 11:07 PM

Definitely the sending unit. It always is when the gas gauge screws up. Hardly ever hear of it being the gauge itself. You might be able to pull the sending out and fix it yourself maybe its hanging up, or rusted terribly like mine was and just won't function correctly. Check it out.

72tutone · 10-30-2010, 12:09 AM

Thanks guys... Believe it or not, a nut was loose on the circuit board. And soon as it tightened up and made contact with the copper ring, the gauge went to 3/4 full. Key is off and its sitting at that spot. My guess its now working.

So keep that mind, tighten your nuts

DaSchlange · 10-30-2010, 12:10 AM

Lol, first time for everything I guess.... Can't believe you ever let your nut get that loose anyhow...

Jacfourteen · 10-30-2010, 02:08 AM

Good to hear you got it fixed, I thought that it was strange that it happened right after you had the gauge out. Just a note, the needle is balanced so it stays where ever it was when the key was on after you turn it off.

swamp rat · 10-30-2010, 05:43 PM

Rule of thumb,if something is working correctly before a person takes something apart and puts it back together it can usually be traced back to something that was overlooked, disturbed or reassembled incorrectly.

10-29-2010, 10:33 PM	#1
72tutone Registered User Join Date: May 2010 Location: St.Louis Posts: 644	Fuel Gauge stuck at 1/2 tank Guys I just took out my dash bezel to replace some bulbs, and touch up the needles. Since I have put it back int the gauge needle is stuck at 1/2 tank. I put 20$ worth in today, and the needle didnt move. I didnt want to take the chance in running out while I was out on the road, however the needle didnt move. Everything I have read on the boards say there is tan wire going to 16pin connector or so going into the electrical board on the back. Is there anything on the back of the gauge that needed to be hooked back up?

10-29-2010, 11:01 PM	#2
72freak Rottenwood Garage Member Join Date: May 2005 Location: Marietta, Georgia Posts: 4,321	Re: Fuel Gauge stuck at 1/2 tank sending unit? __________________ 2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! *It's not just a hobby..It's a LIFESTYLE!!!* Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere!

10-29-2010, 11:07 PM	#3
DaSchlange Registered User Join Date: Sep 2010 Location: Gainesville, MO Posts: 251	Re: Fuel Gauge stuck at 1/2 tank Definitely the sending unit. It always is when the gas gauge screws up. Hardly ever hear of it being the gauge itself. You might be able to pull the sending out and fix it yourself maybe its hanging up, or rusted terribly like mine was and just won't function correctly. Check it out.

10-30-2010, 12:09 AM	#4
72tutone Registered User Join Date: May 2010 Location: St.Louis Posts: 644	Re: Fuel Gauge stuck at 1/2 tank Thanks guys... Believe it or not, a nut was loose on the circuit board. And soon as it tightened up and made contact with the copper ring, the gauge went to 3/4 full. Key is off and its sitting at that spot. My guess its now working. So keep that mind, tighten your nuts

10-30-2010, 12:10 AM	#5
DaSchlange Registered User Join Date: Sep 2010 Location: Gainesville, MO Posts: 251	Re: Fuel Gauge stuck at 1/2 tank Lol, first time for everything I guess.... Can't believe you ever let your nut get that loose anyhow...

10-30-2010, 02:08 AM	#6
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Fuel Gauge stuck at 1/2 tank Good to hear you got it fixed, I thought that it was strange that it happened right after you had the gauge out. Just a note, the needle is balanced so it stays where ever it was when the key was on after you turn it off. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's

10-30-2010, 05:43 PM	#7
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: Fuel Gauge stuck at 1/2 tank Rule of thumb,if something is working correctly before a person takes something apart and puts it back together it can usually be traced back to something that was overlooked, disturbed or reassembled incorrectly. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's



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