My fuel gage indicator does not work

If your fuel gauge is showing you in accurate readings this is normal to all vehicles that are not used to fill-up gas full regularly but sometimes the cause of the inacuracy is due to faulty float valve in the gas tank you need to replace it

this problem is caused by a defective gas tank sending unit for the gage and the low fuel light, replace the sending unit.

u need to change this gauge or try to dissasseble and clean it very well then try to install it back again

You will need to remove the fuel tank from the truck and replace the fuel pump/fuel level sensor module that is inside the fuel tank. Use extreme caution when doing this as there is a real fire hazard.

Jason, as far as the fuel gage, try a couple of resisters at the wiring for fuel gage sending unit, in gas tank. It's two wires, use the resister inline between the two wires. One resister is for low fuel level, the other for high fuel, If the gage reacts properly to both resisters, the problem is the sending unit in the gas tank. You can try 40 ohm and 250 ohm resistors. I used to get resistors from radio shack, I don't know if they went bankrupt? The store in my community closed. Other places may have resisters?
Just to add, the wire colors for sending unit/sensor are purple and black with white tracer.

It sounds odd that both cars are experiencing the same problem. This usually indicates a problem with the gas tank not venting properly.

sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

Yes it is all one unit, and yes that is what the problem is. don't use aftermarket parts, use OEM, (Delco Remy) they are much better quality.

your fuel pump/fuel gauge assembly are mounted in top of your gas tank probably when you overfilled it popped loose jamming your fuel gauge you will need to drop your tank down and check this (make sure you empty tank first if not its a heavy load )inspect fuel guage assembly for damage and probably just reinstall if not damaged good luck hope this helps you

It could be the fuel level sending unit is stuck or going out. It's in the gas tank.