6L Engine (2015) - <30K miles
7L Engine (2013-2015) - 90K-120K miles
B5254T7 engine) MT Transmission (2011-2013) - 120K-150K miles
transmission ID HWD AT Transmission (2006) - 90K-120K miles
8L Engine (2021-2022) - 30K-60K miles
(2013) GMC Truck-Sierra Denali 2500 (2011 Up) AT, 6.6L, 4x2 AT Transmission - 120K-150K miles Used OEM Part 6L Engine (2015) - <30KGMC Truck Sierra Denali 2500 (2011 Up) AT, 6. 6L, 4x2 AT Transmission (2013) 120K 150K miles This used OEM transmission is listed as its own product for the 120K 150K miles option, so the price shown belongs to this exact mileage selection. It is a practical replacement choice for buyers who want an OEM style part without dealer new pricing. Please verify fitment before ordering. Match the year, make, model, engine size, drivetrain, VIN notes,