Fuel guage

[rfischba1]

Having this problem with my cucv fuel guage, when I picked the truck up the guage worked, now it stays stuck way past full with only 1/2 tank.
Is this the guage or the float stuck? (86 cucv pu)

 

[EO2NMCB]

Its a crap shoot. Most often the sending unit will go bad in the tank. It's a PITA the pull the unit cause you have to drop the fuel tank. If you pull the unit, you can check the sending unit with a multimeter. Ohm the unit while moving the float, if the ohms stays the same while moving the float its a bad sending unit.

 

[bryab123]

if the gauge goes way past full check grounds and connections first.