Auxiliary tank.....can I do this

[72 cheyenne pdx]

I run only my aux tanks. I have the original 3-way toggle switch in the dash and a mechanical valve on the floor between the door and seat. Mine holds a total of 34 gallons (17 in ea.). If your truck already had Aux tank(s) before and replacing it, it should be a bolt in type of deal. If you are adding an Aux tank, you will have to plumb hose(s), the neck, run the sender wire, cut out the hole in the bed or bedside(s), and possily drill the holes in the frame to mount the tank. It may be better just to add the blazer tank between the frame rails.

Good luck