2005 Pontiac GTO Owner's Manual - Page 220

Power Steering Fluid How to Check Power Steering Fluid The fluid level should be checked after the vehicle has been driven for at least 20 minutes, so that the fluid is warm. A cold level check can be done after the engine has been off for at least five hours. However, the hot level check is recommended. The fluid level can be viewed through the reservoir. The level markings are next to the fluid window. When the fluid is cold, the level should be between the COLD MIN (Minimum) and MAX (Maximum) marks. When the vehicle has been driven for at least 20 minutes and the fluid is hot, the level should be between the HOT MIN and MAX marks. If fluid must be added, turn the cap counterclockwise to the stop; then the cap can be lifted off. Do not overfill the reservoir and remember to replace the cap tightly when you are finished and clean up any spilled fluid. If you often need to add fluid, you should see your dealer. The power steering fluid reservoir is located toward the front of the engine compartment on the driver's side of the vehicle. See Engine Compartment Overview on page 5-12 for reservoir location. 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. What to Use To determine what kind of fluid to use, see Recommended Fluids and Lubricants on page 6-12. Always use the proper fluid. Failure to use the proper fluid can cause leaks and damage hoses and seals. 5-34