Oil Gauge Problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Eyegore · 09-15-2008, 07:18 PM

OK the old oil gauge was not working not even moving when power was applied. I replaced it with another gauge and it powers up fine, but when I start the motor it pegs clear over to the right side, to the highest psi then it stays there when I turn the motor off, to the right side that is. After that I click the ignition back on to power, not cranking the motor, it then goes back to the left side of the gauge to the lowest psi while power is kept on. Can anyone give me a hint of what might be the problem and a solution? Is it the sending unit that is the problem? A while back at the autoparts store they showed me a completely different sending unit that is in there now, it was a canister type.
This is for a 1978 454 3/4 ton.

**old Rusty C10** · 09-15-2008, 08:16 PM

sounds like a sending unit ... i always use the guages which arent electrical tho

salrod00 · 09-15-2008, 11:07 PM

oil sending unit. you might want to take yours off first and take it up there with you. there are different psi ratings on those..oh yeah my ran around 8 bucks.. good luck.

Prong · 09-16-2008, 06:09 PM

Quote:

Originally Posted by salrod00

oil sending unit. you might want to take yours off first and take it up there with you. there are different psi ratings on those..oh yeah my ran around 8 bucks.. good luck.

My 79 did this--turned out to be the ground wire. Check out the ground leads that run from the loom to the 6 prong post on the cab wall (above and left of the fuse box).

09-15-2008, 07:18 PM	#1
Eyegore What Hump? Join Date: Apr 2003 Location: New River AZ Posts: 2,009	Oil Gauge Problem OK the old oil gauge was not working not even moving when power was applied. I replaced it with another gauge and it powers up fine, but when I start the motor it pegs clear over to the right side, to the highest psi then it stays there when I turn the motor off, to the right side that is. After that I click the ignition back on to power, not cranking the motor, it then goes back to the left side of the gauge to the lowest psi while power is kept on. Can anyone give me a hint of what might be the problem and a solution? Is it the sending unit that is the problem? A while back at the autoparts store they showed me a completely different sending unit that is in there now, it was a canister type. This is for a 1978 454 3/4 ton. __________________ Lil red 86 c-10 99 Sub 78 Camper Special w/ 454

09-15-2008, 08:16 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: Oil Gauge Problem sounds like a sending unit ... i always use the guages which arent electrical tho __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

09-15-2008, 11:07 PM	#3
salrod00 Registered User Join Date: Dec 2007 Location: tyler texas Posts: 165	Re: Oil Gauge Problem oil sending unit. you might want to take yours off first and take it up there with you. there are different psi ratings on those..oh yeah my ran around 8 bucks.. good luck.



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