2005 Cadillac XLR Owner's Manual - Page 331

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. See Engine Compartment Overview on page 6-12 for 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, press down and turn it clockwise (right) until you hear a clicking sound. Make sure you fully install the cap. Engine Overheating You will find a COOLANT OVER TEMP message or an ENGINE HOT, STOP ENGINE message displayed in the Driver Information Center (DIC). See DIC Warnings and Messages on page 3-64. You will also hear a chime. There is also an engine coolant temperature gage on the instrument panel cluster. See Engine Coolant Temperature Gage on page 3-54. 6-23