2004 Buick Century Owner's Manual - Page 248

When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless there appears to be a leak in the system or an unusual noise is heard. 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. How to Check Power Steering Fluid Turn the key off, let the engine compartment cool down, wipe the cap and the top of the reservoir clean, then unscrew the cap and wipe the dipstick with a clean rag. Replace the cap and completely tighten it. Then remove the cap again and look at the fluid level on the dipstick. When the engine compartment is hot, the level should be at the H (hot) mark. When it is cold, the level should be at the C (cold) mark. If the fluid is at the ADD mark, fluid should be added. Windshield Washer Fluid What to Use When the vehicle needs windshield washer fluid, be sure to read the manufacturer's instructions before use. If the vehicle will be operating in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. 5-36