If at all possible stay with the factory transfer pump. I originally went with a crossover setup and one draw back is on a long trip after about 45 mins the fuel gauge will drop to E, because theres no change in the sending unit for such a period of time, the computer is programed to drop the gauge to warn of an issue. It will eventually start reading again once you use all the fuel in the back tank and the level in the front starts to drop, it would still make me nervous till that gauge started working again.
2008 gmc sierra 3500HD LMM bds 7" 37" AT3Ws,built trans,possible s475 over stock build,
2004 Suburban 2500HD, 4x4, LBZ/Allison, DSP5, MBRP,
2005 Hummer H2, Blk on Blk, LLY/Allison 4x4, EFI Live by ME!
2018 Tahoe premier RST (future Iml or l5p?)
2001 GMC Yukon Denali XL 2500HD 4x4, LB7/Allison EFI Live DSP2 by Theferminator, MBRP,
2003 GMC 2500HD 4x4 CCSB, LLY/Allison, DSP5 EFI live by Idaho Rob, 5" MBRP exhaust, 6" pro comp lift, 35" nittos, LBZ mp
2003 GMC Yukon XL, 2500HD, 4x4 LBZ/Allison, EFI live by Idaho Rob
2003 GMC Yukon Denali XL 2500HD 4x4, LBZ/Allison, EFI live DSP5 by Theferminator
2006 GMC 3500HD C&C, LBZ/Allison, 14' aluminum dump bed