Genuine GM OEM Buick Cadillac Power Steering Pump Pulley 12589054 300-128 Condition: New Manufacturer Part Number: 12589054 Other Part Number: 300-128 Brand: GM, OEM, Buick, Cadillac, Oldsmobile, Pontiac Quantity: 1 Power Steering Pump Pulley PULLEY. Steering Pump. PULLEY,P/S PUMP(19MM SHAFT)(USED WITH 88955485 SERVICE PUMP). Required: 01 For: KD HEARSE CONVERSION(B9Q),LIMO PKG(V4U),TRLR PROVISIONS(V92),DEVILLE LIVERY(W20) (1998-1999) (1998 - 1999).