2007 CADILLAC DTS PROFESSIONAL check engine light

You can run the engine to keep warm, but be
careful.
{CAUTION:
Snow can trap exhaust gases under your
vehicle. This can cause deadly CO
(carbon monoxide) gas to get inside. CO
could overcome you and kill you. You
cannot see it or smell it, so you might not
know it is in your vehicle. Clear away
snow from around the base of your
vehicle, especially any that is blocking the
exhaust pipe. And check around again
from time to time to be sure snow does
not collect there.
Open a window just a little on the side of
the vehicle that is away from the wind.
This will help keep CO out.
Run your engine only as long as you must. This
saves fuel. When you run the engine, make it go a
little faster than just idle. That is, push the
accelerator slightly. This uses less fuel for the
heat that you get and it keeps the battery charged.
331

Service........................................................ 353
Accessories and Modications................... 353
California Proposition 65 Warning.............. 354
Doing Your Own Service Work.................. 354
Adding Equipment to the Outside of
Your Vehicle.......................................... 355
Fuel............................................................. 355
Gasoline Octane........................................ 356
Gasoline Specications.............................. 356
California Fuel........................................... 356
Additives................................................... 357
Fuels in Foreign Countries........................ 358
Filling the Tank......................................... 358
Filling a Portable Fuel Container............... 361
Checking Things Under the Hood.............. 362
Hood Release........................................... 363
Engine Compartment Overview.................. 364
Engine Oil................................................. 365
Engine Oil Life System.............................. 368
Engine Air Cleaner/Filter............................ 370
Automatic Transaxle Fluid......................... 372
Engine Coolant.......................................... 374
Coolant Surge Tank Pressure Cap............ 377
Engine Overheating................................... 377Overheated Engine Protection
Operating Mode..................................... 379
Cooling System......................................... 380
Power Steering Fluid................................. 385
Windshield Washer Fluid........................... 386
Brakes...................................................... 387
Battery...................................................... 390
Jump Starting............................................ 392
Headlamp Aiming........................................ 397
Bulb Replacement....................................... 400
High Intensity Discharge (HID) Lighting..... 400
Windshield Wiper Blade Replacement....... 400
Tires............................................................ 402
Tire Sidewall Labeling............................... 403
Tire Terminology and Denitions............... 408
Ination - Tire Pressure............................. 411
High-Speed Operation............................... 413
Tire Pressure Monitor System................... 414
Tire Inspection and Rotation...................... 418
When It Is Time for New Tires.................. 419
Buying New Tires...................................... 420
Different Size Tires and Wheels................ 422
Uniform Tire Quality Grading..................... 422
Section 5 Service and Appearance Care
351

Gasoline Octane
Use premium unleaded gasoline with a posted
octane rating of 91 or higher. You can also use
regular unleaded gasoline rated at 87 octane or
higher, but your vehicle’s acceleration could be
slightly reduced, and you might notice a slight
audible knocking noise, commonly referred to as
spark knock. If the octane is less than 87, you might
notice a heavy knocking noise when you drive. If
this occurs, use a gasoline rated at 87 octane or
higher as soon as possible. Otherwise, you could
damage the engine. If you are using gasoline rated
at 87 octane or higher and you hear heavy
knocking, the engine needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 357for additional information.
California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate on
fuels that meet California specications. See
the underhood emission control label. If this fuel is
not available in states adopting California
emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 234. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the type
of fuel used, repairs may not be covered by
your warranty.
356

How to Add Automatic Transaxle Fluid
Refer to the Maintenance Schedule to determine
what kind of transaxle uid to use. See
Recommended Fluids and Lubricants on page 475.
If the uid level is low, add only enough of the
proper uid to bring the level into the
cross-hatched area on the dipstick.
1. Pull out the dipstick.
2. Using a long-neck funnel, add enough uid at
the dipstick hole to bring it to the proper level.
It does not take much uid, generally less
than one pint (0.5 L). Do not overll.
Notice:Use of the incorrect automatic
transaxle uid may damage your vehicle, and
the damages may not be covered by your
warranty. Always use the automatic transaxle
uid listed inRecommended Fluids and
Lubricants on page 475.
3. After adding uid, recheck the uid level as
described under “How to Check Automatic
Transaxle Fluid,” earlier in this section.
4. When the correct uid level is obtained, push
the dipstick back in all the way and turn the
handle clockwise.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, if you add only DEX-COOL
®extended
life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, seeEngine
Overheating on page 377.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Giving freezing protection down to
−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as
they should.
374

CD, MP3 ..................................................... 287
Center Console Storage Area...................... 155
Center Flex Storage Unit............................. 156
Center Front Passenger Position,
Safety Belts............................................... 35
Center Seat.................................................. 17
Chains, Tire................................................. 426
Charging System Light................................ 229
Check
Engine Light............................................ 234
Checking Things Under the Hood................ 362
Chemical Paint Spotting.............................. 448
Child Restraints
Child Restraint Systems............................. 49
Infants and Young Children........................ 45
Lower Anchors and Tethers
for Children............................................ 55
Older Children........................................... 42
Securing a Child Restraint in a
Rear Seat Position................................. 63
Securing a Child Restraint in the
Center Front Seat Position..................... 65
Securing a Child Restraint in the
Right Front Seat Position........................ 66
Where to Put the Restraint........................ 54
Cigarette Lighter.......................................... 209Cleaning
Aluminum or Chrome-Plated Wheels........ 446
Exterior Lamps/Lenses............................. 444
Fabric/Carpet........................................... 441
Finish Care.............................................. 444
Inside of Your Vehicle.............................. 440
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 443
Leather.................................................... 442
Speaker Covers....................................... 443
Tires........................................................ 447
Underbody Maintenance........................... 448
Washing Your Vehicle.............................. 444
Weatherstrips........................................... 444
Windshield and Wiper Blades................... 445
Wood Panels........................................... 443
Climate Control System
Air Filter, Passenger Compartment ........... 220
Dual......................................................... 210
Outlet Adjustment..................................... 217
Rear........................................................ 218
Clock..................................................210, 269
Coinholder(s)............................................... 155
Collision Damage Repair............................. 493
Comfort Guides, Rear
Safety Belt................................................. 39
505

Driving
At Night................................................... 318
City.......................................................... 322
Defensive................................................. 302
Drunken................................................... 303
Freeway................................................... 323
Hill and Mountain Roads.......................... 326
In Rain and on Wet Roads...................... 320
Rocking Your Vehicle to Get it Out.......... 333
Winter...................................................... 328
Dual Climate Control System....................... 210
E
EDR ............................................................ 500
Electrical System
Add-On Equipment................................... 451
Fuses and Circuit Breakers...................... 452
Headlamp Wiring..................................... 451
Power Windows and Other
Power Options...................................... 452
Rear Underseat Fuse Block..................... 455
Underhood Fuse Block............................. 452
Windshield Wiper Fuses........................... 451Engine
Air Cleaner/Filter...................................... 370
Check and Service Engine
Soon Light............................................ 234
Coolant.................................................... 374
Coolant Heater......................................... 121
Coolant Temperature Gage...................... 233
Coolant Temperature Warning Light.......... 233
Drive Belt Routing.................................... 477
Engine Compartment Overview................ 364
Exhaust................................................... 130
Oil ........................................................... 365
Oil Life System........................................ 368
Overheated Protection
Operating Mode.................................... 379
Overheating............................................. 377
Running While Parked............................. 131
Starting.................................................... 119
Entry Lighting.............................................. 200
Event Data Recorders................................. 500
Extender, Safety Belt..................................... 42
Exterior Lamps............................................ 193
Exterior Lighting Battery Saver.................... 199
507

N
Navigation System, Privacy......................... 501
Navigation/Radio System,
see Navigation Manual............................. 296
New Vehicle Break-In.................................. 117
Normal Maintenance
Replacement Parts................................... 476
O
Odometer.................................................... 224
Off-Road Recovery...................................... 315
Oil
Engine..................................................... 365
Pressure Light.......................................... 237
Oil, Engine Oil Life System......................... 368
Older Children, Restraints............................. 42
Online Owner Center................................... 485
OnStar, Privacy........................................... 501
OnStar
®System, see OnStar®Manual........ 139
Operation, Universal Home
Remote System..............................144, 148
Other Warning Devices................................ 164
Outlet Adjustment........................................ 217Outlets
Accessory Power..................................... 208
Outside
Automatic Dimming Mirror........................ 138
Convex Mirror.......................................... 138
Curb View Assist Mirror........................... 138
Heated Mirrors......................................... 138
Power Foldaway Mirrors........................... 137
Overheated Engine Protection
Operating Mode....................................... 379
Owner Checks and Services....................... 471
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 447
Panic Brake Assist...................................... 312
Parade Dimming.......................................... 200
Park Aid...................................................... 202
Park (P)
Shifting Into............................................. 126
Shifting Out of......................................... 129
Parking
Assist....................................................... 202
Brake....................................................... 125
Over Things That Burn............................ 129
512

Rainsense™ II Wipers................................. 173
Reading Lamps........................................... 200
Rear Climate Control System...................... 218
Rear Door Security Locks........................... 104
Rear Heated Seats....................................... 17
Rear Safety Belt Comfort Guides.................. 39
Rear Seat Armrest...................................... 157
Rear Seat Passengers, Safety Belts.............. 36
Rearview Mirror, Automatic Dimming
with Compass.......................................... 136
Rearview Mirror, Automatic Dimming
with OnStar
®and Compass..................... 134
Rearview Mirror with Compass and
Temperature............................................... 18
Reclining Seatbacks, Power.......................... 14
Recommended Fluids and Lubricants.......... 475
Recreational Vehicle Towing........................ 340
Remote Keyless Entry (RKE) System............ 95
Remote Keyless Entry (RKE) System,
Operation................................................... 96
Removing the Flat Tire and Installing
the Spare Tire.......................................... 431
Removing the Spare Tire and Tools............ 429Reporting Safety Defects
Canadian Government............................. 497
General Motors........................................ 498
United States Government....................... 497
Restraint System Check
Checking the Restraint Systems................. 88
Replacing Restraint System Parts
After a Crash......................................... 89
Retained Accessory Power (RAP)................ 119
Right Front Passenger Position,
Safety Belts............................................... 34
Roadside
Service.................................................... 488
Rocking Your Vehicle to Get it Out.............. 333
Routing, Engine Drive Belt.......................... 477
Running the Engine While Parked............... 131
S
Safety Belt
Passenger Reminder Light....................... 225
Pretensioners............................................. 41
Reminder Light........................................ 225
514