It is probably a bad float and you will have to replace the sending unit assembly.
A mechanical oil gauge may bounce if you are low on oil. An electric oil gauge may bounce if the sending unit or the gauge itself is faulty and of course you are low on oil.
The sending unit in the gas tank is bad.
Your fuel sending unit is malfunctioning.
Probly bad connection or just a bad sensor.
The fuel gauge on a Chevy may become stuck if the sending unit is defective or become disconnected. Without a signal from the tank, the gauge will not move.
1993 chevy 4.3 v6 1500 truck temp gauge inoperative,
your oil pump or your gauge is going out
It is to prevent the fuel from sloshing back and forth. Fuel sloshing can cause the fuel gauge to be erratic.It is to prevent the fuel from sloshing back and forth. Fuel sloshing can cause the fuel gauge to be erratic.
If the gas gauge stops working is there a fuse for it?
We replaced the temperature gauge in my 1991 Chevy blazer what is the normal operating temp?
how to install the oil pressure gauge on a Chevy 350 small block
By hooking up a vacuum gauge could help indentify bad valve. the needle of the gauge would bounce erractically during idle.