what can be wrong in my car with the gas tank. on 2007 Chevrolet Equinox

when I put gas in my car the arrow goes up and down it doesn't show me how much gas is on the car.

Asked by for the 2007 Chevrolet Equinox
1 answer
the fuel sending unit is bad, but they only come as a complete fuel cell. good delco part installed between 700.00 and 900.oo parts and labor