I just bought a 2001 chevy silverado 8.1 litre. The fuel gauge stays on empty with the fuel light coming on until I place the gear selector in park then it will read full, but when I start driving the truck it will go back to empty for a while. Or if it is on empty I can turn the key on and it will either go to full (when the tank is full) or it won't do anything. Can anyone help me on this?

 

It sonds like a bad connection. Have you tried talking to the Creator?

 

I think fuel level sensor is showing wrong reading.If you hook up a scanner you may find DTC P0461 to P0463 If you found any of these codes,check circuit,if it is ok drop the tank and replace fuel level sensor.

 

The weirdest thing, I went down to the parts store and bought some fuel system cleaner called greased lightning and it quit acting up! So thanks for all your help!!