2001 Chevrolet Impala Owner's Manual - Page 315

Radiator Pressure Cap The radiator pressure cap is located in the front of the engine compartment on the passenger's side, near the diagonal cross brace. See "Engine Compartment Overview" in the Index for more information on location. Power Steering Fluid The power steering fluid reservoir is located toward the rear of the engine compartment, on the passenger's side. See "Engine Compartment Overview" in the Index for more information on location. NOTICE: Your radiator cap is a 15 psi (105 kPa) pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap line up with the overflow tube on the radiator filler neck. When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect there is a leak in the system or you hear an unusual noise. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. 6-28