Flange, transfer caseMaker: CHEVROLETModels: SIERRA 2500 HD Cab & Chassis, SIERRA 2500 HD Crew Cab Pickup, SIERRA 2500 HD Extended Cab Pickup, SIERRA 2500 HD Standard Cab Pickup, SIERRA 3500 Cab & Chassis, SIERRA 3500 Crew Cab Pickup, SIERRA 3500 HD Cab & Chassis, SIERRA 3500 HD Crew Cab Pickup, SIE..