All trucks will overflow if parked where the gas cap is "downhill". The overflow will also remove all the paint if left only for a few minutes. With the gas tank behind you in the cab you will always smell gas if you overfill when taking on gas . Try not to overfill-stop when the pump cuts off the first time. Make sure the gauge gasket isn't leaking-even a new gasket leaks if not properly installed. Hope this helps.

Green Machine