Old post, but I could use some info on this -
I have a similar swap - 2002 Yukon Xl - dual tank - with the LBZ - I have most everything sorted out, but the secondary fuel tank does not transfer to the primary.
Quick Question - do you have a wiring diagram for the secondary pump, or do you remember the wire colors for +/- to energize the pump - I will be installing a manual transfer switch.
Thanks!