1995 Buick LeSabre Owner's Manual - Page 221

Radiator Pressure Cap Power Steering Fluid I NOTICE: Your radiator cap is a 15 psi (105 kPa) pressure-type capand must be tightly installed to prevent coolant loss and possible engine damage from overheating.Be sure the arrows the cap on line up with the overflow tube on the radiator filler neck. When you replace your radiator pressure cap, an AC@ cap is recommended. Thermostat Engine coolant temperatureis controlled by a thermostat in the engine coolant system. The thermostat stops the flow of coolant through the radiator until the coolant reaches a preset temperature. When you replace your thermostat, an AC" thermostat is recommended. How To Check Power Steering Fluid When the engine compartment is cool, 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 tluid level on the dipstick. The level should be at the FULL COLD mark. Add enough fluid to bring the level up to the mark. A fluid loss in this system could indicate a problem. Have the system inspected and repaired. 6-19