Review on 🔋 Enhance Fuel Efficiency with GM Genuine Parts D7003 Fuel Tank Selector Switch by Mar Pacora

They don't sell the single wire version anymore so I had to use the multi wire version where the sensors switch also in the valve. This is a snap switch that only activates when you press the switch all the way down (does not work for the fuel pump circuit). The switch is larger than the original switch on my 1975 so I had to trim the dash to fit. I had to make an e-bolt out of sheet metal to secure the switch. Connect the auxiliary tank sensor wire to one of the other original wires on the switch to route it to the valve. In general this worked for my application but doesn't work when you need power for the fuel pump. They sell another for this app