gas guage question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 01-07-2005, 02:35 PM

I have the two gas tanks with the in cab switch. My question is latley one of my tanks has been reading way past full then if I play with the switch it will go back to normal. Is this the switch in the cab going bad?

Thanks for any help.

76bonanza · 01-08-2005, 09:22 AM

Anyone?

MSL · 01-08-2005, 09:35 AM

It sounds like by your description that the switch is going out or it may have a loose wire. You might try having someone hit the switch while you listen to see if the fuel tank selector solenoid is making the noise as soon as the switch is hit if its delayed then try another switch.

Mudder · 01-08-2005, 09:35 AM

Thinking maybe it the ground on the tank that is causing the guage to read high.

Nolowrider · 01-10-2005, 10:09 AM

Mine does the same thing. The gauge would read way past full. I took the gauge out to check it,but can't really tell if it bad or not. What should the gauge do with nothing hooked up? I moved the needle by hand and it just stays in the same place when power is re-applied. It is a lot of work to remove the tank, so I want to make sure it is not the gauge that is bad.

79BIG10 · 01-11-2005, 05:51 PM

They are right. You have a bad ground on that side you flip to.

76bonanza · 01-11-2005, 07:09 PM

on the tank right any idea were they ground them at?

01-07-2005, 02:35 PM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	gas guage question I have the two gas tanks with the in cab switch. My question is latley one of my tanks has been reading way past full then if I play with the switch it will go back to normal. Is this the switch in the cab going bad? Thanks for any help. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO Last edited by 76bonanza; 01-08-2005 at 09:22 AM.

01-08-2005, 09:22 AM	#2
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Anyone? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

01-11-2005, 05:51 PM	#6
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	They are right. You have a bad ground on that side you flip to. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

01-11-2005, 07:09 PM	#7
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	on the tank right any idea were they ground them at? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

01-08-2005, 09:35 AM	#3
MSL Registered User Join Date: Mar 2003 Location: So.Oregon Posts: 765	It sounds like by your description that the switch is going out or it may have a loose wire. You might try having someone hit the switch while you listen to see if the fuel tank selector solenoid is making the noise as soon as the switch is hit if its delayed then try another switch.

01-08-2005, 09:35 AM	#4
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	Thinking maybe it the ground on the tank that is causing the guage to read high.

01-10-2005, 10:09 AM	#5
Nolowrider Senior Member Join Date: Jan 2005 Location: New Orleans Posts: 1,365	Mine does the same thing. The gauge would read way past full. I took the gauge out to check it,but can't really tell if it bad or not. What should the gauge do with nothing hooked up? I moved the needle by hand and it just stays in the same place when power is re-applied. It is a lot of work to remove the tank, so I want to make sure it is not the gauge that is bad.



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