Description: Genuine GM AWD Transfer Case Assembly, part number 23387157. This GM OEM AWD transfer case assembly is a factory axle or driveline component that transfers power to the wheels. Made by General Motors to original equipment standards for correct fit, finish and durability—no guesswork with aftermarket parts. Verify fitment using your VIN or GM part number 23387157 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.