1998 Chevrolet Astro Owner's Manual - Page 292

How To Check Power SteeringFluid When the engine compartment is cool, wipe the cap and the top of the reservoir clean, then unscrew thecap 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. The level should be atthe FULL COLD mark. If necessary, add only enoughfluid to bring the level up to the mark. 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 vehiclein an area where the temperature may fall below freezing, use afluid that has sufficient protection against freezing. Adding Washer Fluid IOpen the cap labeled WASHER FLUID ONLY. Add washer fluid until the tank is full, What to Use To determine what kindof fluid to use, see "Recommended Fluids and Lubricants" in Index. the Always use the proper fluid. Failure to use the proper fluid can cause leaks anddamage hoses and seals. 6-30