check engine CADILLAC DTS PROFESSIONAL 2007 1.G Service Manual

(j)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer/retailer perform this service. See
Engine Coolant on page 374 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap, and ller neck. Pressure test the cooling
system and pressure cap.
(k)A uid loss in any vehicle system could
indicate a problem. Have the system inspected
and repaired and the uid level checked. Add uid
if needed.
(l)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
(m)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help ensure
the safety, dependability, and emission control
performance of your vehicle. Your GM
Goodwrench
®dealer can assist you with these
checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 475.
471

At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 365for
further details.
Notice:It is important to check the engine oil
regularly and keep it at the proper level.
Failure to keep the engine oil at the proper
level can cause damage to the engine not
covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 374for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in
the windshield washer uid reservoir and add the
proper uid if necessary.
At Least Once a Month
Tire Ination Check
Inspect your vehicle’s tires and make sure they
are inated to the correct pressures. Do not forget
to check the spare tire. SeeInation - Tire
Pressure on page 411. Check to make sure the
spare tire is stored securely. SeeChanging a Flat
Tire on page 428.
Tire Wear Inspection
Tire rotation may be required for high mileage
highway drivers prior to the Engine Oil Life System
service notication. Check the tires for wear
and, if necessary, rotate the tires. SeeTire
Inspection and Rotation on page 418.
472

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle.
2. Firmly apply both the parking brake and the
regular brake. SeeParking Brake on
page 125.
Do not use the accelerator pedal, and be
ready to turn off the engine immediately if
it starts.
3. Try to start the engine in each gear. The
vehicle should start only in PARK (P) or
NEUTRAL (N). If the vehicle starts in any
other position, contact your dealer/retailer
for service.
Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. SeeParking
Brake on page 125.
Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to RUN,
but do not start the engine. Without applying
the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact
your dealer/retailer for service.
473

Ignition Transmission Lock Check
While parked, and with the parking brake set, try
to turn the ignition to OFF in each shift lever
position.
The ignition should turn to OFF only when the
shift lever is in PARK (P).
The ignition key should come out only in OFF.
Contact your dealer/retailer if service is required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
room in front of your vehicle in case it
begins to roll. Be ready to apply the
regular brake at once should the vehicle
begin to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular
brake, set the parking brake.
To check the parking brake’s holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take
care to clean thoroughly any areas where mud and
other debris can collect.
474

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