2005 Pontiac Bonneville Owner's Manual - Page 296

{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. Do not spill coolant on a hot engine. When replacing the pressure cap, make sure the arrow lines up with the tube. Coolant Surge Tank Pressure Cap (4.6L V8 Engine) Notice: If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured. See Engine Compartment Overview on page 5-12 for more information on location. Engine Overheating (3.8L V6 Engine) You will find a coolant temperature gage or a DIC warning message about a hot engine on your vehicle's instrument panel. See Engine Coolant Temperature Gage (V6 Engine) on page 3-45 or Engine Coolant Temperature Gage (V8 Engine) on page 3-46 and DIC Warnings and Messages on page 3-62. Radiator Pressure Cap (3.8L V6 Engine) Notice: The radiator cap on your vehicle is a 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. See Engine Compartment Overview on page 5-12 for more information on location. 5-36