The switch location and labeling might vary slightly depending on the specific configuration of your truck. The best way to be certain is:
1. Check the switch itself: Look closely at the switch; it might have markings indicating which position corresponds to which tank.
2. Consult your owner's manual: If you have the original owner's manual, it should clearly show the operation of the fuel tank selector switch.
3. Visually inspect the fuel lines: If you're comfortable doing so (and have the necessary safety precautions), trace the fuel lines from the selector switch to the tanks. This will definitively show which position activates which tank.
Don't rely solely on general information; confirm it on your vehicle to avoid problems.
