Power Steering Pump Assembly for Chevrolet Impala Malibu Monte Carlo Uplander Power Steering Fluid Reservoir Cap Pump Pulley 19369078 19207430 15267531 12593693. [Part Number] 19369078, 88964571 (Power Steering Pump); 19207430, 15267585, 88964358 (Power Steering Fluid Reservoir); 15267531 (Reservoir Cap); 12593693 (Power Steering Pump Pulley).