So yes on the factory 4x4, which means absolutely not a 2500? I saw the 6 lug pattern but I have seen that on a 3/4 ton truck before so it had me confused. AWD is only a 1500 option correct?
I think the newer GM 1500s have 6 lug wheels, so it could be AWD 1500 with 6 lug. Ford has gone to 8 lugs on an E150 too.