Black plate (18,1)Cadillac CTS Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-6081492) - 2014 - CRC 2nd Edition - 11/18/1310-18 Vehicle CareCaution (Continued)vehicle warranty. Always useDEX-COOL (silicate-free) coolantin the vehicle.Engine CoolantThe cooling system in the vehicle isfilled with DEX-COOL enginecoolant. See Maintenance Scheduleon page 11-3 and RecommendedFluids and Lubricants onpage 11-13.The following explains the coolingsystem and how to check and addcoolant when it is low. If there is aproblem with engine overheating,see Engine Overheating onpage 10-21.What to Use{ WarningAdding only plain water or someother liquid to the cooling systemcan be dangerous. Plain waterand other liquids, can boil beforethe proper coolant mixture will.The coolant warning system is setfor the proper coolant mixture.With plain water or the wrongmixture, the engine could get toohot but you would not get theoverheat warning. The enginecould catch fire and you or otherscould be burned. Use a 50/50 mixture of clean, drinkablewater and DEX-COOL coolant.Use a 50/50 mixture of cleandrinkable water and DEX-COOLcoolant. This mixture:. Gives freezing protection downto −37°C (−34°F), outsidetemperature.. Gives boiling protection up to129°C (265°F), enginetemperature.. Protects against rust andcorrosion.. Will not damage aluminum parts.. Helps keep the proper enginetemperature.{ CautionIf improper coolant mixture,inhibitors, or additives are used inthe vehicle cooling system, theengine could overheat and bedamaged. Too much water in themixture can freeze and crackengine cooling parts. The repairswould not be covered by thevehicle warranty. Use only theproper mixture of engine coolantfor the cooling system. SeeRecommended Fluids andLubricants on page 11-13.
