1998 Chevrolet Blazer Owner's Manual - Page 297

Thermostat Engine coolant temperature is controlled by a thermostat in theengine coolant system. The thermostat stops the flow of coolant through the radiator until the coolant reaches a preset temperature. When to Check Power Steering Fluid It isnot necessary to regularly check power steering fluid unless you suspect there is a leak in the system or you hear an unusualnoise. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. Power Steering Fluid 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 capand 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 betweenthe ADD and FULL marks. If necessary, add only enoughfluid to bring the level up to the proper range. 1 What to Use To determine what kind of fluid to use, see "Recommended Fluids and Lubricants" in the Index. Always use the proper fluid. Failure to use the proper fluid can cause leaks and damage hoses andseals. 6-27