speedometer & gas gauge problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cabrera13 · 01-03-2013, 12:09 AM

both of there needles wobble when i drive, even when im stopped. How can i resolve this?? any help? thanks!

J Knight · 01-03-2013, 11:52 AM

This is an odd problem because the speedo is mechanical and the gas gauge is electrical. The only thing I can think of is you speedo cable might be bad and shakeing the whole cluster housing. If you have a later model(88-91?) with electric speedo maybe its a ground issue.
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JRANGER · 01-03-2013, 01:20 PM

If mechanical it could be the gauge or the cable may need to be lubed.....

I had the same problem with the gas gauge...I replaced my sending unit but since my bed is off the truck have yet to be able to test it.....The old one sure was rusted in well though

THE "10" SILVERADO · 01-03-2013, 04:06 PM

A gas gauge needle does move alot because of the float in the tank that moves. (even when stopped the gas can slosh around). Ground not working or only working sometimes? That would probably move the needle on a flat surface since it relies on resistance.

cabrera13 · 01-03-2013, 04:35 PM

Ok yea ive heard lubbing up the speedometer cable cud help. & where is the ground for the gas gauge
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Ski-me · 01-03-2013, 04:45 PM

Quote:

Originally Posted by cabrera13

Ok yea ive heard lubbing up the speedometer cable cud help. & where is the ground for the gas gauge
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It's within the printed circut board on back of cluster. What year is your truck?

cabrera13 · 01-03-2013, 04:55 PM

Oh ok. A 78'
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motornut · 01-03-2013, 06:05 PM

make sure the cable is locked in for the speedo
make sure the gas gauge power gets it's own ground,they all use one,worked for me

cabrera13 · 01-03-2013, 09:11 PM

Gaa damn ,wires evrywhere ahaha. Alrite I'll look back there. I just hav to know how to get my stereo out because its not the a-track,its a cd
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THE "10" SILVERADO · 01-03-2013, 11:43 PM

Quote:

Originally Posted by motornut

make sure the cable is locked in for the speedo
make sure the gas gauge power gets it's own ground,they all use one,worked for me

is it just me or is that ground nice and crispy?

motornut · 01-04-2013, 12:01 AM

Quote:

Originally Posted by THE "10" SILVERADO

is it just me or is that ground nice and crispy?

Na it's just blurry
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01-03-2013, 12:09 AM	#1
cabrera13 Registered User Join Date: Dec 2012 Location: Fresno, CA Posts: 12	speedometer & gas gauge problem both of there needles wobble when i drive, even when im stopped. How can i resolve this?? any help? thanks!

01-03-2013, 11:52 AM	#2
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: speedometer & gas gauge problem This is an odd problem because the speedo is mechanical and the gas gauge is electrical. The only thing I can think of is you speedo cable might be bad and shakeing the whole cluster housing. If you have a later model(88-91?) with electric speedo maybe its a ground issue. Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

01-03-2013, 01:20 PM	#3
JRANGER Registered User Join Date: Nov 2011 Location: Nashville TN Posts: 3,595	Re: speedometer & gas gauge problem If mechanical it could be the gauge or the cable may need to be lubed..... I had the same problem with the gas gauge...I replaced my sending unit but since my bed is off the truck have yet to be able to test it.....The old one sure was rusted in well though __________________ PLEASE HELP WITH PROJECT UNDERHAULIN http://67-72chevytrucks.com/vboard/showthread.php?t=306320 Gemini - 1978 GMC C15 High Sierra - 305 c/e - Given to Mother Electra - 1967 Mustang Coupe - 302/w 3 speed Build Chyna - 1968 Chevy C20 Long Stepper

01-03-2013, 04:06 PM	#4
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	Re: speedometer & gas gauge problem A gas gauge needle does move alot because of the float in the tank that moves. (even when stopped the gas can slosh around). Ground not working or only working sometimes? That would probably move the needle on a flat surface since it relies on resistance. __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

01-03-2013, 04:35 PM	#5
cabrera13 Registered User Join Date: Dec 2012 Location: Fresno, CA Posts: 12	Re: speedometer & gas gauge problem Ok yea ive heard lubbing up the speedometer cable cud help. & where is the ground for the gas gauge Posted via Mobile Device

01-03-2013, 04:55 PM	#7
cabrera13 Registered User Join Date: Dec 2012 Location: Fresno, CA Posts: 12	Re: speedometer & gas gauge problem Oh ok. A 78' Posted via Mobile Device

01-03-2013, 06:05 PM	#8
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: speedometer & gas gauge problem make sure the cable is locked in for the speedo make sure the gas gauge power gets it's own ground,they all use one,worked for me Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

01-03-2013, 09:11 PM	#9
cabrera13 Registered User Join Date: Dec 2012 Location: Fresno, CA Posts: 12	Re: speedometer & gas gauge problem Gaa damn ,wires evrywhere ahaha. Alrite I'll look back there. I just hav to know how to get my stereo out because its not the a-track,its a cd Posted via Mobile Device



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