2000 Pontiac Firebird Owner's Manual - Page 277

If you need more coolant, add the proper DEX-COOLR coolant mixture at the coolant recovery tank, but only when your engine is cool. If the tank is very low or empty, also add coolant to the radiator. See "Engine Overheating" in the Index for information. Adding Coolant to the Recovery Tank CAUTION: You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and it will burn if the engine parts are hot enough. Don't spill coolant on a hot engine. Occasionally check the coolant level in the radiator. For information on how to add coolant to the radiator, see "Cooling System" in the Index. CAUTION: Turning the radiator pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn you badly. Never turn the pressure cap -- even a little -when the engine and radiator are hot. Add coolant mixture at the recovery tank, but be careful not to spill it. Radiator Pressure Cap NOTICE: Your radiator cap is an 18 psi (124 kPa) pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Be sure the arrows on the cap line up with the overflow tube on the radiator filler neck. 6-29