BobRip
Elite Member
A lot of vehiles have a tube that comes out of the tank and has a rubber cap on it. This is located in different places on different vehicles. On my 89 Chrysler van it was located above the left rear wheel. You could get to it without going under the vehicle. Trace the lines from the gas tank and you can probably find it. It is for emptying the tank when you have to drop the tank and change out the fuel pump or fuel sender. It's about 1/4 in diameter.