Do you know which center section has been used on these hitches? The original 959 center section from B&W will bolt up to the new 2011 models, but B&W redesigned them and labeled them 959N (IIRC) to better fit the hydroformed rails. I'm a B&W dealer and received an email from them saying not to use the 959 center sections on the 2011 trucks.
I'll double check the part numbers when I get to work in the morning.
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter