2010 CADILLAC DTS Owners Manual

How to Reset the Engine Oil Life
System
The Engine Oil Life System calculates when to changethe engine oil and filter based on vehicle use. Wheneverthe oil is changed, reset the system so it can calculatewhen the next oil change is required. If a situation occurswhere the oil is changed prior to a CHANGE ENGINE OILSOON message in the Driver Information Center (DIC)being turned on, reset the system.
After the oil has been changed, the CHANGE ENGINEOIL SOON message must be reset:
1. Turn the key to the ON/RUN position withoutstarting the engine.
2. Press the INFO button on the Driver InformationCenter (DIC) until OIL LIFE REMAINING isdisplayed. SeeDIC Operation and Displays onpage 4-62.
3. Press and hold the INFO RESET button until 100%is displayed. This resets the oil life indicator.
4. Turn the key to LOCK/OFF.
If the CHANGE ENGINE OIL SOON message comesback on when the vehicle is started, the engine oillife system has not reset. Repeat the procedure.
What to Do with Used Oil
Used engine oil contains certain elements that can beunhealthy for your skin and could even cause cancer.Do not let used oil stay on your skin for very long. Cleanyour skin and nails with soap and water, or a goodhand cleaner. Wash or properly dispose of clothing orrags containing used engine oil. See the manufacturer’swarnings about the use and disposal of oil products.
Used oil can be a threat to the environment. If youchange your own oil, be sure to drain all the oil from thefilter before disposal. Never dispose of oil by putting itin the trash, pouring it on the ground, into sewers, or intostreams or bodies of water. Recycle it by taking it to aplace that collects used oil.
Engine Air Cleaner/Filter
SeeEngine Compartment Overview on page 6-12forthe location of the engine air cleaner/filter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the MaintenanceIIintervals and replace it at the first oil change after each50,000 mile (80 000 km) interval. SeeScheduledMaintenance on page 7-3for more information. If youare driving in dusty/dirty conditions, inspect the filterat each engine oil change.
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How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/filter, remove the filter from thevehicle and lightly shake the filter to release loose dustand dirt. If the filter remains caked with dirt, a new filteris required.
To inspect or replace the filter:
1. Remove the two screws on the top of the engine aircleaner/filter cover.
2. Lift up the outboard side of the cover at an anglewhile pulling toward you. This is necessary due tothe two hinges located on the inboard side ofthe cover.
3. Remove the engine air cleaner/filter and any loosedebris that may be found in the air cleaner base.
4. Inspect or replace the air filter element.
To reinstall the cover:
1. Align the two hinges located on the inboard side ofthe cover.
2. Push the cover slightly down and towards theengine to engage the tabs in the hinges andalign the two screws.
3. Tighten the two screws on the top of the engine aircleaner/filter cover.
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{WARNING:
Operating the engine with the air cleaner/filter off
can cause you or others to be burned. The air
cleaner not only cleans the air; it helps to stop
flames if the engine backfires. If it is not there and
the engine backfires, you could be burned. Do not
drive with it off, and be careful working on the
engine with the air cleaner/filter off.
Notice:If the air cleaner/filter is off, a backfire cancause a damaging engine fire. And, dirt caneasily get into the engine, which will damage it.Always have the air cleaner/filter in place when youare driving.
Automatic Transmission Fluid
When to Check and Change Automatic
Transmission Fluid
A good time to check the automatic transmission fluidlevel is when the engine oil is changed.
Change the fluid and filter at the intervals listed inScheduled Maintenance on page 7-3, and be sure touse the transmission fluid listed inRecommended Fluidsand Lubricants on page 7-8.
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How to Check Automatic
Transmission Fluid
Because this operation can be a little difficult, you maychoose to have this done at the dealer/retailer servicedepartment.
If you do it yourself, be sure to follow all the instructionshere or you could get a false reading on the dipstick.
Notice:Too much or too little fluid can damageyour transmission. Too much can mean that someof the fluid could come out and fall on hot engineparts or exhaust system parts, starting a fire.Too little fluid could cause the transmission tooverheat. Be sure to get an accurate reading if youcheck your transmission fluid.
Wait at least 30 minutes before checking thetransmission fluid level if you have been driving:
•When outside temperatures are above 32°C (90°F).
•At high speed for quite a while.
•In heavy traffic — especially in hot weather.
•While pulling a trailer.
To get the right reading, the fluid should be atnormal operating temperature, which is 82°C to 93°C(180°F to 200°F).
Get the vehicle warmed up by driving about 24 km(15 miles) when outside temperatures are above10°C (50°F). If it is colder than 10°C (50°F), you mayhave to drive longer.
Checking the Fluid Level
Prepare the vehicle as follows:
1. Park the vehicle on a level place. Keep the enginerunning.
2. With the parking brake applied, place the shift leverin P (Park).
3. With your foot on the brake pedal, move the shiftlever through each gear range, pausing for aboutthree seconds in each range. Then, positionthe shift lever in P (Park).
4. Let the engine run at idle for three to five minutes.
Then, without shutting off the engine, follow these steps:
1. Locate the transmission fluid cap which is locatednext to the radiator hose and below the engine aircleaner/filter assembly on the driver side of thevehicle. The cap is marked TRANS FLUID.SeeEngine Compartment Overview on page 6-12for more information on location.
2. After removing the engine air cleaner/filter assemblyto reach the transmission fluid cap, turn the capcounterclockwise to remove. Pull out the dipstickand wipe it with a clean rag or paper towel.
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3. Push it back in all the way, wait three seconds, andthen pull it back out again.
4. Check both sides of the dipstick and readthe lower level. The fluid level must be in thecross-hatched area.
5. If the fluid level is in the acceptable range, push thedipstick back in all the way and turn the handleclockwise.
6. Reinstall the engine air cleaner/filter assembly.
How to Add Automatic Transmission
Fluid
Refer to the Maintenance Schedule to determine whatkind of transmission fluid to use. SeeRecommendedFluids and Lubricants on page 7-8.
If the fluid level is low, add only enough of the properfluid to bring the level into the cross-hatched area onthe dipstick.
1. Pull out the dipstick.
2. Using a long-neck funnel, add enough fluid at thedipstick hole to bring it to the proper level.
It does not take much fluid, generally less thanone pint (0.5 L). Do not overfill.
Notice:Use of the incorrect automatic transmissionfluid may damage the vehicle, and the damagesmay not be covered by the vehicle’s warranty.Always use the automatic transmission fluid listedinRecommended Fluids and Lubricants on page 7-8.
3. After adding fluid, recheck the fluid level asdescribed under “How to Check AutomaticTransmission Fluid,” earlier in this section.
4. When the correct fluid level is obtained, pushthe dipstick back in all the way and turn thehandle clockwise.
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Cooling System
The cooling system allows the engine to maintain the correct working temperature.
A. Coolant Surge Tank with Pressure CapB. Electric Engine Cooling Fans
4.6L L37 Engine shown, 4.6L LD8 Engine similar
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{WARNING:
An electric engine cooling fan under the hood can
start up even when the engine is not running and
can cause injury. Keep hands, clothing, and tools
away from any underhood electric fan.
{WARNING:
Heater and radiator hoses, and other engine parts,
can be very hot. Do not touch them. If you do, you
can be burned.
Do not run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
Notice:Using coolant other than DEX-COOL®cancause premature engine, heater core, or radiatorcorrosion. In addition, the engine coolant couldrequire changing sooner, at 50 000 km (30,000 miles)or 24 months, whichever occurs first. Any repairswould not be covered by the vehicle warranty.Always use DEX-COOL®(silicate-free) coolant inthe vehicle.
Engine Coolant
The cooling system in the vehicle is filled withDEX-COOL®engine coolant. This coolant is designedto remain in the vehicle for five years or 150,000 miles(240 000 km), whichever occurs first.
The following explains the cooling system and how tocheck and add coolant when it is low. If there is aproblem with engine overheating, seeEngineOverheating on page 6-27.
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What to Use
{WARNING:
Adding only plain water to the cooling system can
be dangerous. Plain water, or some other liquid
such as alcohol, can boil before the proper coolant
mixture will. The vehicle’s coolant warning system
is set for the proper coolant mixture. With plain
water or the wrong mixture, the engine could get
too hot but you would not get the overheat
warning. The engine could catch fire and you or
others could be burned. Use a 50/50 mixture of
clean, drinkable water and DEX-COOL®coolant.
Use a 50/50 mixture of clean, drinkable water andDEX-COOL®coolant. If using this mixture, nothing elseneeds to be added. This mixture:
•Gives freezing protection down to!34°F (!37°C),
outside temperature.
•Gives boiling protection up to 265°F (129°C),
engine temperature.
•Protects against rust and corrosion.
•Will not damage aluminum parts.
•Helps keep the proper engine temperature.
Notice:If an improper coolant mixture is used, theengine could overheat and be badly damaged.The repair cost would not be covered by the vehiclewarranty. Too much water in the mixture canfreeze and crack the engine, radiator, heater core,and other parts.
Notice:If extra inhibitors and/or additives are usedin the vehicle’s cooling system, the vehicle couldbe damaged. Use only the proper mixture ofthe engine coolant listed in this manual for thecooling system. SeeRecommended Fluids andLubricants on page 7-8for more information.
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