* This lift kit is designed to fit vehicles with either cast steel, stamped steel or aluminum components. * Does not fit Denali with Magnetic Ride.* Does not fit Hybrid eAssist models* If wider than 33x12.50 tires are used, offset wheels will be required and trimming may be required. Requires minor cutting and drilling for installation.* Factory 20in wheels can be run.* If truck is equipped with a mass damper on the front differential, the damper must be removed.