1997 GMC Sonoma Owner's Manual - Page 267

When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect thereis a leak in the system or you hear an unusual noise. A fluid loss in this system could indicate aproblem. Have the system inspected and repaired. What to Use To determine what kind of fluid to use, see "Recommended Fluids and Lubricants" inthe Index. the Always use the proper fluid. Failure to use proper fluid can cause leaks and damage hoses and seals. How To Check Power Steering Fluid When the engine compartment is cool, 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 atthe fluid levelon the dipstick. The level should be between the ADDand FULL marks. For the 2.2L engine, the fluid level shouldbe at the C mark. If necessary, add only enough fluid to bring the level up to the proper range. Windshield Washer Fluid What to Use When you need windshield washer fluid, be sure to read the manufacturer's instructions before use. If you will be operating your vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. 6-29