2004 Cadillac DeVille Owner's Manual - Page 308

{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. If the CHECK COOLANT LEVEL message comes on and stays on, it means you are low on engine coolant. For more information see DIC Warnings and Messages on page 3-62. Adding Coolant If you need more coolant, add the proper DEX-COOL® coolant mixture at the surge tank, but only when the engine is cool. Coolant Surge Tank Pressure Cap 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. 5-28