Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20112 found under Radiator Engine Coolant by General Motors Corp. The National Stock Number assigned to this part is 2930013155511, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20112.