2006 CADILLAC DTS PROFESSIONAL check engine

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 2-30.
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
GM Goodwrench
®dealer for service.
Automatic Transaxle 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 2-30.
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 GM Goodwrench
®dealer
for service.
6-10

Ignition Transaxle 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 key should come out only in OFF.
Contact your GM Goodwrench
®dealer if service is
required.
Parking Brake and Automatic Transaxle
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 transaxle 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 GM Goodwrench
®dealer 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.
6-11

Center Seat..................................................... 1-7
Chains, Tire...................................................5-70
Charging System Light....................................3-61
Check
Engine Light...............................................3-66
Checking Things Under the Hood......................5-10
Chemical Paint Spotting...................................5-89
Child Restraints
Child Restraint Systems...............................1-36
Infants and Young Children...........................1-33
Lower Anchors and Tethers for Children............1-41
Older Children.............................................1-30
Securing a Child Restraint in a
Rear Seat Position...................................1-48
Securing a Child Restraint in the
Center Front Seat Position........................1-50
Securing a Child Restraint in the
Right Front Seat Position..........................1-51
Where to Put the Restraint...........................1-40
Cigarette Lighter.............................................3-43
Cleaning
Aluminum or Chrome-Plated Wheels..............5-88
Exterior Lamps/Lenses.................................5-86
Fabric/Carpet..............................................5-84
Finish Care.................................................5-87
Inside of Your Vehicle..................................5-83
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-85Cleaning (cont.)
Leather......................................................5-85
Speaker Covers..........................................5-86
Tires..........................................................5-88
Underbody Maintenance...............................5-89
Washing Your Vehicle...................................5-86
Weatherstrips..............................................5-86
Windshield and Wiper Blades........................5-87
Wood Panels..............................................5-85
Climate Control System
Air Filter, Passenger Compartment.................3-53
Dual..........................................................3-44
Outlet Adjustment........................................3-50
Rear..........................................................3-51
Clock............................................................3-44
Coinholder(s)..................................................2-49
Collision Damage Repair..................................7-10
Comfort Guides, Rear Safety Belt.......................1-27
Compass................................1-8, 2-35, 2-37, 2-39
Content Theft-Deterrent....................................2-19
Control of a Vehicle.......................................... 4-5
Convenience Net............................................2-50
Coolant
Engine Temperature Gage............................3-65
Engine Temperature Warning Light.................3-65
Heater, Engine............................................2-25
Surge Tank Pressure Cap.............................5-25
Cooled Seats................................................... 1-3
3

E
Electrical System
Add-On Equipment......................................5-92
Fuses and Circuit Breakers...........................5-93
Headlamp Wiring.........................................5-92
Power Windows and Other Power Options.........5-93
Rear Underseat Fuse Block..........................5-96
Underhood Fuse Block.................................5-93
Windshield Wiper Fuses...............................5-92
Engine
Air Cleaner/Filter.........................................5-18
Battery.......................................................5-37
Check and Service Engine Soon Light............3-66
Coolant......................................................5-22
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-65
Coolant Temperature Warning Light................3-65
Engine Compartment Overview......................5-12
Exhaust.....................................................2-33
Oil .............................................................5-13
Oil Life System...........................................5-16
Overheated Protection Operating Mode...........5-27
Overheating................................................5-25
Starting......................................................2-24
Entry Lighting.................................................3-36
Event Data Recorders (EDR)............................. 7-9
Extender, Safety Belt.......................................1-29Exterior Lamps...............................................3-30
Exterior Lighting Battery Saver..........................3-35
F
Filter
Engine Air Cleaner......................................5-18
Finish Damage...............................................5-89
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass.................................................3-13
Flat Tire........................................................5-71
Flat Tire, Changing.........................................5-72
Flat Tire, Storing.............................................5-81
Fluid
Automatic Transaxle.....................................5-19
Power Steering...........................................5-33
Windshield Washer......................................5-34
Fog Lamp Light..............................................3-69
Fog Lamp Light, Rear.....................................3-69
Fog Lamps....................................................3-35
Forward Collision Alert (FAC) System.................. 3-9
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
5

Fuel (cont.)
Gage.........................................................3-70
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers...........................5-93
Rear Underseat Fuse Block..........................5-96
Underhood Fuse Block.................................5-93
Windshield Wiper.........................................5-92
G
Gage
Engine Coolant Temperature.........................3-65
Fuel..........................................................3-70
Speedometer..............................................3-57
Tachometer.................................................3-57
Garage Door Opener.......................................2-45
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-6
Glove Box.....................................................2-49
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-6
Headlamp
Aiming.......................................................5-44
Headlamp Wiring............................................5-92
Headlamps
Bulb Replacement.......................................5-47
Daytime Running Lamps...............................3-34
Flash-to-Pass..............................................3-13
High Intensity Discharge (HID) Lighting...........5-47
High/Low Beam Changer................................ 3-9
On Reminder..............................................3-34
Wiper Activated...........................................3-34
Heated Seats................................................... 1-3
Heated Steering Wheel..................................... 3-7
Heater...........................................................3-44
Highbeam On Light.........................................3-70
Highway Hypnosis...........................................4-24
Hill and Mountain Roads..................................4-24
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
6

Mirrors
Automatic Dimming Mirror with Intellibeam™,
OnStar
®, and Compass.............................2-35
Automatic Dimming Rearview with Compass....2-39
Automatic Dimming Rearview with OnStar
®
and Compass..........................................2-37
Manual Rearview Mirror with Compass
and Temperature........................................ 1-8
Memory.....................................................2-52
Outside Automatic Dimming Mirror.................2-42
Outside Convex Mirror.................................2-42
Outside Curb View Assist Mirror....................2-42
Outside Heated Mirrors................................2-42
Outside Power Foldaway Mirrors....................2-41
MyGMLink.com................................................ 7-3
N
Navigation/Radio System, see
Navigation Manual.....................................3-121
New Vehicle Break-In......................................2-23
Normal Maintenance Replacement Parts............6-13
O
Odometer......................................................3-57
Off-Road Recovery..........................................4-13
Oil
Engine.......................................................5-13
Pressure Light.............................................3-68
Oil, Engine Oil Life System..............................5-16
Older Children, Restraints................................1-30
Online Owner Center........................................ 7-3
OnStar
®System, see OnStar®Manual...............2-43
Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-50
Outlet(s), Accessory Power...............................3-42
Outside
Automatic Dimming Mirror.............................2-42
Convex Mirror.............................................2-42
Curb View Assist Mirror................................2-42
Heated Mirrors............................................2-42
Power Foldaway Mirrors...............................2-41
Overheated Engine Protection Operating Mode.....5-27
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
9

Rear Seat Armrest..........................................2-50
Rear Seat Passengers, Safety Belts..................1-24
Rearview Mirror, Automatic Dimming
with Compass.............................................2-39
Rearview Mirror, Automatic Dimming with
OnStar
®and Compass.................................2-37
Rearview Mirror with Compass and Temperature..... 1-8
Reclining Seatbacks, Power............................... 1-4
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-37
Remote Keyless Entry System............................ 2-4
Remote Keyless Entry System, Operation............ 2-5
Removing the Flat Tire and Installing
the Spare Tire.............................................5-75
Removing the Spare Tire and Tools...................5-73
Reporting Safety Defects
Canadian Government..................................7-14
General Motors...........................................7-14
United States Government............................7-13
Restraint System Check
Checking the Restraint Systems....................1-71
Replacing Restraint System Parts
After a Crash..........................................1-72
Retained Accessory Power (RAP)......................2-24
Right Front Passenger Position, Safety Belts.........1-22
Roadside
Service........................................................ 7-6
Rocking Your Vehicle to Get it Out....................4-31
Running the Engine While Parked.....................2-34
S
Safety Belt
Passenger Reminder Light............................3-58
Pretensioners..............................................1-29
Reminder Light............................................3-57
Safety Belts
Care of......................................................5-86
Center Front Passenger Position....................1-23
Driver Position............................................1-15
How to Wear Safety Belts Properly................1-14
Questions and Answers About Safety Belts........1-13
Rear Safety Belt Comfort Guides...................1-27
Rear Seat Passengers.................................1-24
Right Front Passenger Position......................1-22
Safety Belt Extender....................................1-29
Safety Belt Use During Pregnancy.................1-22
Safety Belts Are for Everyone......................... 1-9
Shoulder Belt Height Adjuster........................1-21
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seats
Center Seat.................................................. 1-7
Head Restraints............................................ 1-6
Heated and Cooled Seats.............................. 1-3
Heated Seats - Rear..................................... 1-7
Massaging Lumbar........................................ 1-3
Memory.....................................................2-52
Power Lumbar.............................................. 1-2
11