1997 Pontiac Bonneville Owner's Manual - Page 280

If this light comes on, it means you're low on engine coolant. LOW COOLANT You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and itwill burn if the engine parts are hot enough. Don't spill coolanton a hot engine. Adding Coolant If you need more coolant, add the proper DEX-COOL@ coolant mixture at the coolant recovery tank, but be careful not to spill it. Radiator Pressure Cap NOTICE: Your radiator cap is a 15 psi (105 kPa) pressure-type cap and 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. Turning the radiator pressure cap when the engine and radiator are hot can steam and allow scalding liquids to blow out and burn badly. you With the coolant recovery tank, will almost you never have to add coolant the radiator. at Never turn the radiator pressure capeven a little when the engine and radiator arehot. -- -- 6-27