I looked Thru the search site & found much info regarding aux fuel tanks. I looked up at the fuel fill ,vent hoses area where I guess you could?tap in for the aux fuel tank for transfer. What dangers can you get in here?Can you mess up your main tank pump?Can you get air in the system?I would like about 50/60 extra gal of fuel, & the simplest most foolproof system to accomplish this. Anybody do this to their gen 3 truck? Or is this a have it done job? Thanks,Pat