1997 Pontiac Trans Sport Owner's Manual - Page 349

Add coolant mixture at the recoverytank, but be careful not to spill it. I Radiator Pressure Cap NOTICE: You can be burned if you spill coolanton hot engine parts. Coolant contains ethylene glycol, and itwill burn if the engineparts are hot enough. Don't spill coolanton a hotengine. 1 ' Your radiator capis a 15 psi (105 kPa) pressuretype cap and must tightly installed be to prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap up with the overflow tube on line the radiator€iller neck. When you replace yourradiator pressure cap, an AC@ cap is recommended. Thermostat Engine coolant temperature 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 yourthermostat, an AC@ thermostat is recommended.