2007 Cadillac DTS Owner's Manual - Page 369

Adding Coolant If you need more coolant, add the proper DEX-COOL® coolant mixture at the coolant 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. See Engine Compartment Overview on page 356 for more information on location. {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 to turn the cap until it clicks. Engine Overheating You will find an ENGINE OVERHEATED IDLE ENGINE message or an ENGINE OVERHEATED STOP ENGINE message displayed in the Driver Information Center (DIC). See DIC Warnings and Messages on page 239 for more information. You will also hear a chime. There is also an engine temperature warning light and/or gage on the instrument panel cluster. See Engine Coolant Temperature Warning Light on page 226 and Engine Coolant Temperature Gage on page 226. 369