2007 Cadillac STS Owner's Manual - Page 403

Power Steering Fluid See Engine Compartment Overview on page 373 for reservoir location. How to Check Power Steering Fluid To check the power steering fluid, do the following: 1. Turn the ignition off and let the engine compartment cool down. 2. Wipe the cap and the top of the reservoir clean. 3. Unscrew the cap and wipe the dipstick with a clean rag. 4. Replace the cap and completely tighten it. 5. Remove the cap again and look at the fluid level on the dipstick. 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. The level should be within the HOT mark. If necessary, add only enough fluid to bring the level within the mark. What to Use To determine what kind of fluid to use, see Recommended Fluids and Lubricants on page 516. Always use the proper fluid. Failure to use the proper fluid can cause leaks and damage hoses and seals. 403