2010 CADILLAC DTS engine overheat

You may decide not to lift the hood when this warningappears, but instead get service help right away.SeeRoadside Service on page 8-7.
If you do decide to lift the hood, make sure the vehicleis parked on a level surface.
Then check to see if the engine cooling fans arerunning. If the engine is overheating, both fans shouldbe running. If they are not, do not continue to runthe engine and have the vehicle serviced.
Notice:Engine damage from running the enginewithout coolant is not covered by the warranty.
Notice:If the engine catches fire while driving withno coolant, the vehicle can be badly damaged.The costly repairs would not be covered bythe vehicle warranty. SeeOverheated EngineProtection Operating Mode on page 6-29forinformation on driving to a safe place in anemergency.
If Steam Is Coming From The Engine
Compartment
{WARNING:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Turn it off and get everyone away from the
vehicle until it cools down. Wait until there is no sign
of steam or coolant before you open the hood.
If you keep driving when the vehicles engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop the engine if it
overheats, and get out of the vehicle until the
engine is cool.
SeeOverheated Engine Protection Operating Mode
on page 6-29for information on driving to a safe
place in an emergency.
6-28

If No Steam Is Coming From The
Engine Compartment
If an engine overheat warning is displayed but no steamcan be seen or heard, the problem may not be tooserious. Sometimes the engine can get a little too hotwhen the vehicle:
•Climbs a long hill on a hot day.
•Stops after high-speed driving.
•Idles for long periods in traffic.
•Tows a trailer.
If 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) whilestopped. If it safe to do so, pull off the road, shift toP (Park) or N (Neutral) and let the engine idle.
If the temperature overheat gage is no longer in theoverheat zone or an overheat warning no longer displays,the vehicle can be driven. Continue to drive the vehicleslow for about 10 minutes. Keep a safe vehicle distancefrom the car in front of you. If the warning does not comeback 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 for threeminutes while parked. If the warning is still displayed, turnoff the engine until it cools down. Also, see!OverheatedEngine Protection Operating Mode!next in this section.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and themessage ENGINE OVERHEATED STOP ENGINE isdisplayed, an overheat protection mode which alternatesfiring groups of cylinders helps prevent engine damage.In this mode, you will notice a loss in power andengine performance. This operating mode allows yourvehicle to be driven to a safe place in an emergency.Driving extended miles (km) and/or towing a trailer in theoverheat protection mode should be avoided.
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 oil andreset the oil life system. SeeEngine Oil onpage 6-13.
6-29

Driving (cont.)Hill and Mountain Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14In Rain and on Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9Rocking Your Vehicle to Get it Out . . . . . . . . . . . . . . . . . 5-17Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15Driving for Better Fuel Economy . . . . . . . . . . . . . . . . . . . . . . . 1-22Dual Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36
E
EDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18Electrical Equipment, Add-On . . . . . . . . . . . . . . . . . . . . . . . . . . 6-100Electrical SystemFuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . 6-101Headlamp Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-100Power Windows and Other Power Options . . . . 6-101Rear Underseat Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . 6-104Underhood Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-101Windshield Wiper Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-100Electronic ImmobilizerPASS-Key®III+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Electronic Immobilizer OperationPASS-Key®III+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21EngineAir Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17Check and Service Engine Soon Lamp . . . . . . . . . . . 4-57Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26Coolant Temperature Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56Coolant Temperature Warning Light . . . . . . . . . . . . . . . . 4-55Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13Overheated Protection Operating Mode . . . . . . . . . . . 6-29Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24Engine OilLife System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31Event Data Recorders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19Extender, Safety Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33Exterior Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
5

OutsideAutomatic Dimming Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38Convex Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39Power Foldaway Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37Overheated Engine Protection Operating Mode . . . . . 6-29Owner Checks and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6Owners, Canadian . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
P
Paint, Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-98Parade Dimming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31ParkShifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32Park Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40Park Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39ParkingAssist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30Over Things That Burn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 4-51Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . 4-44Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67Passing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
PASS-Key®III+ Electronic Immobilizer . . . . . . . . . . . . . . . 3-21PASS-Key®III+ Electronic Immobilizer Operation . . . 3-21Perchlorate Materials Requirements, California . . . . . . 6-4Performance Shifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29PhoneBluetooth®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108PowerDoor Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-101Lumbar Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Rear Lumbar Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8Retained Accessory (RAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24Seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3Steering Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30Tilt Wheel and Telescopic Steering Column . . . . . . . 4-4Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15Pregnancy, Using Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31Privacy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18Navigation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20Radio Frequency Identification (RFID) . . . . . . . . . . . . . 8-20ProgramCourtesy Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11Programmable Automatic Door Locks . . . . . . . . . . . . . . . . . 3-10Proposition 65 Warning, California . . . . . . . . . . . . . . . . . . . . . . . 6-4
10