Fuel guage

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Downsouth86

Junior Member
Joined
Nov 9, 2023
Posts
1
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0
Location
SoCal
First Name
Mike
Truck Year
1986
Truck Model
C10
Engine Size
305
My fuel guage on 86 c10 won’t read past half when I fill tank, every now and then on start up it will jump around to full then back to half , I replaced sending unit but no change, anyone else experience this?
 

RustyPile

Left on own accord
Joined
Oct 7, 2017
Posts
901
Reaction score
1,124
Location
Elkhart, TX
First Name
Nick
Truck Year
1983 GMC
Truck Model
1500
Engine Size
350 SBC
Check the resistor on the back of the gauge. Remove it from the gauge to properly test.. Should read ~ 85 - 90 ohms, 87 is ideal...
 

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