Cadillac 2011 DTS Owner's Manual

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Black plate (31,1)Cadillac DTS Owner Manual - 2011If the overheat warning is displayed with no sign ofsteam:1. Turn the air conditioning off.2. Turn the heater on to the highest temperature andto the highest fan speed. Open the windows asnecessary.3. In heavy traffic, let the engine idle in N (Neutral)while stopped. If it safe to do so, pull off the road,shift to P (Park) or N (Neutral) and let theengine idle.If the temperature overheat gauge is no longer in theoverheat zone or an overheat warning no longerdisplays, the vehicle can be driven. Continue to drivethe vehicle slow for about 10 minutes. Keep a safevehicle distance from the vehicle in front. If the warningdoes not come back on, continue to drive normally.If the warning continues, pull over, stop, and park thevehicle right away.If there is no sign of steam, idle the engine forthree minutes while parked. If the warning is stilldisplayed, turn off the engine until it cools down. Also,see "Overheated Engine Protection Operating Mode"next in this section.Overheated Engine ProtectionOperating ModeIf an overheated engine condition exists and themessage ENGINE OVERHEATED STOP ENGINEis displayed, an overheat protection mode whichalternates firing groups of cylinders helps preventengine damage. In this mode, you will notice a loss inpower and engine performance. This operating modeallows your vehicle to be driven to a safe place in anemergency. Driving extended miles (km) and/or towinga trailer in the overheat protection mode should beavoided.Notice: After driving in the overheated engineprotection operating mode, to avoid engine damage,allow the engine to cool before attempting anyrepair. The engine oil will be severely degraded.Repair the cause of coolant loss, change the oiland reset the oil life system. See Engine Oil onpage 6‑15.6-31