Erratic Fuel Gage

lb23 · 03-30-2007, 11:15 AM

Hello, I'm new to this forum. Normally a lurker, but I need some help today.
I have a 1987 Diesel Suburban (360,000 miles). The fuel gage started bouncing all over. The only time it is stable is when the tank completely full or almost empty.
I was told many years ago that this was caused when an electrical part in the system goes bad. I don't remember what that part was. Anyone out there know what it is and how to fix the problem?
LB

03chevy · 03-30-2007, 12:08 PM

it's the float on the sending unit this is a common thing with chevys. when they start to show some age then the gauge moves around. if you want to fix it then replace the hole unit. 2 chooses one drop the tank or remove the bed.

bradrhale · 03-30-2007, 03:01 PM

i might agree with you if it had a bed to remove.

mrjohnwayne · 03-30-2007, 08:35 PM

Agreed about the sending unit.

lb23 · 03-31-2007, 09:56 AM

Thanks all
I was hoping that it would something simpler and cheaper.

436'd skylark · 03-31-2007, 10:39 AM

You might wanna make sure the unit is properly grounded and all connections are clean.

03-30-2007, 11:15 AM	#1
lb23 Full Member Join Date: Mar 2007 Posts: 22	Erratic Fuel Gage Hello, I'm new to this forum. Normally a lurker, but I need some help today. I have a 1987 Diesel Suburban (360,000 miles). The fuel gage started bouncing all over. The only time it is stable is when the tank completely full or almost empty. I was told many years ago that this was caused when an electrical part in the system goes bad. I don't remember what that part was. Anyone out there know what it is and how to fix the problem? LB

03-30-2007, 12:08 PM	#2
03chevy Senior Member Join Date: Dec 2006 Location: jax,fl Posts: 1,063	it's the float on the sending unit this is a common thing with chevys. when they start to show some age then the gauge moves around. if you want to fix it then replace the hole unit. 2 chooses one drop the tank or remove the bed. __________________ A dirty mind is a terrible thing to waste!

03-30-2007, 08:35 PM	#4
mrjohnwayne Moderator Join Date: Apr 2005 Location: Texas Posts: 3,221	Agreed about the sending unit. __________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4

03-31-2007, 10:39 AM	#6
436'd skylark Senior Member Join Date: Mar 2007 Location: Buffalo Ny Posts: 629	You might wanna make sure the unit is properly grounded and all connections are clean. __________________ Joe 89 K2500 Chevy, Wee-Oh-five 285K miles, completly rebuilt needs a motor, bad 1962 IHC Scout All Wheel Drive (Scout speak for locking axles) 152 ci, dana everything else

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03-30-2007, 03:01 PM	#3
bradrhale Moderator Join Date: Apr 2006 Location: Texas Posts: 3,620	i might agree with you if it had a bed to remove.

03-31-2007, 09:56 AM	#5
lb23 Full Member Join Date: Mar 2007 Posts: 22	Thanks all I was hoping that it would something simpler and cheaper.

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