1994 Chevrolet Suburban Owner's Manual - Page 285

Surge Tank Pressure Cap- Diesel Engines The surge tank pressure cap must be tightly installed with the arrows on the cap lined up with the top tube of the coolant surge tank. NOTICE: Your surge tank pressure cap 1 s a unique 15 psi (105 kPa) pressure-type cap foruse with surge tank cooling systems only. It must be tightly installedto prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap line up with the top tube of the coolant surge tank. Thermostat Engine coolanttemperature is 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. Power Steering Fluid I NOTICE: Always turn the engine off before checkingor adding power steering fluid. The power steering pump cap is close tothe fan and othermoving parts. 6-40