I came across a pretty nice aluminum 40gal aux tank and want to install it in the bed of my 02 2500. I trying to figure out the venting on my oem tank and am not sure where to look now. Last November I installed a AirDog FP-100 transfer pump that replaces the internal oem pump and it works fine. I bought the gravity feed RDS kit and I'm ready to install it. I need to know where the vent hose actually goes. I also have a couple of options open as well. If the gravity feed doesn't work I do have a raptor transfer pump I can use but I'd like to try and make it as simple and as quick as possible. The oem tank is the 36gal tank. The internal pump also has a capped port on top named "Aux Capped fitting", it also has a roll over valve. It doesn't give a lot of info on capped fitting but I'm guessing it for an auxiliary fuel tank.
If anyone has done this with their trucks I would appreciate any advice and tips
Thanks