2003 Buick Regal Owner's Manual - Page 243
2003 Buick Regal Manual
Page 243 highlights
Power Steering Fluid 13. Then replace the pressure cap. At any time during this procedure if coolant begins to flow out of the filler neck, reinstall the pressure cap. Be sure the arrow on the pressure cap lines up like this. 14. Check the coolant in the recovery tank. The level in the coolant recovery tank should be at the HOT mark when the engine is hot or at the COLD mark when the engine is cold. The power steering fluid reservoir is located on the passenger's side of the vehicle at the back of the engine compartment, and can be identified by the above graphic on the cap. 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. See Engine Compartment Overview on page 5-12 for reservoir location. 5-38