1996 Pontiac Bonneville Owner's Manual - Page 271

Radiator PressureCap Power Steering Fluid NOTICE: Your radiator capis a 15 psi (105kPa) pressure-type capand must be tightly installed to prevent coolantloss and possible engine damage from overheating. Be sure the arrows on the cap line up with the overflow tube on the radiator filler neck. 1 I .: --$,. :; . ' -%.Thermostat Engine coolant temperatureis controlled by a thermostat in the engine coolaxit system. The thermostat stops the flow of coolant throughthe radiator until coolant the reaches a preset temperature. When to Check Power Steering Fluid It is not necessaryto regularly check power steering fluid unless you suspect there a leak in the system or is you hearan unusual noise. A fluid loss in this system could indicatea problem. Have the system inspected and repaired. 6-26