2010 CADILLAC DTS headlamp

4. At a wall, measure from the ground upward (A) tothe recorded distance from Step 3 and mark it.
5. Draw or tape a horizontal line (B) the width of thevehicle at the wall where it was marked in Step 4.
Notice:Do not cover a headlamp to improve beamcut-off when aiming. Covering a headlamp maycause excessive heat build-up which may causedamage to the headlamp.
6. Turn on the low-beam headlamps and place apiece of cardboard or equivalent in front of theheadlamp not being aimed. This should allow onlythe beam of light from the headlamp beingaimed to be seen on the flat surface.
7. Locate the vertical headlamp aiming screws. Theyare located under the hood near each headlampassembly. First lift the flap to access either of them.Each one is the top outboard screw by the “ V” on thecover panel next to the aiming flap.
The adjustment screw can be turned with a 6 mmhex wrench.
8. Turn the vertical aiming screw until the headlampbeam is aimed to the horizontal tape line. Turn itclockwise or counterclockwise to raise or lower theangle of the beam.
The top edge of the cut-off should be positioned atthe bottom edge of the horizontal tape line.
6-42

9. Make sure that the light from the headlamp ispositioned at the bottom edge of the horizontal tapeline. The lamp on the left (A) shows the correctheadlamp aim. The lamp on the right (B) shows theincorrect headlamp aim.
10. Repeat Steps 7 through 9 for the oppositeheadlamp.
Bulb Replacement
It is recommended that all bulbs be replaced by yourdealer/retailer.
High Intensity Discharge (HID)
Lighting
{WARNING:
The low beam high intensity discharge lighting
system operates at a very high voltage. If you try to
service any of the system components, you could
be seriously injured. Have your dealer/retailer or a
qualified technician service them.
The vehicle may have HID headlamps. After an HIDheadlamp bulb has been replaced, you may notice thatthe beam is a slightly different shade than it wasoriginally. This is normal.
6-43

If you need to replace any of your wheels, wheel bolts,wheel nuts, or Tire Pressure Monitor System (TPMS)sensors, replace them only with new GM originalequipment parts. This way, you will be sure to have theright wheel, wheel bolts, wheel nuts, and TPMSsensors for your vehicle.
{WARNING:
Using the wrong replacement wheels, wheel bolts,
or wheel nuts on your vehicle can be dangerous. It
could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts, and wheel nuts for
replacement.
Notice:The wrong wheel can also cause problemswith bearing life, brake cooling, speedometer orodometer calibration, headlamp aim, bumper height,vehicle ground clearance, and tire or tire chainclearance to the body and chassis.
If your vehicle is a professional model, the wheels havea unique offset and bolt hole diameter. Each of thewheels on the professional vehicle have eight wheelsnuts. The wheels on the non-professional vehiclehave five wheel nuts. SeeChanging a Flat Tire onpage 6-80for more information.
Used Replacement Wheels
{WARNING:
Putting a used wheel on the vehicle is dangerous.
You cannot know how it has been used or how far
it has been driven. It could fail suddenly and
cause a crash. If you have to replace a wheel, use
a new GM original equipment wheel.
6-69

Service Parts Identification Label
This label, on the spare tire cover, has the followinginformation:
•Vehicle Identification Number (VIN)
•Model designation
•Paint information
•Production options and special equipment
Do not remove this label from the vehicle.
Electrical System
Add-On Electrical Equipment
Notice:Do not add anything electrical to thevehicle unless you check with your dealer/retailerfirst. Some electrical equipment can damagethe vehicle and the damage would not be coveredby the vehicle’s warranty. Some add-on electricalequipment can keep other components fromworking as they should.
Add-on equipment can drain the vehicle battery, even ifthe vehicle is not operating.
The vehicle has an airbag system. Before attempting toadd anything electrical to the vehicle, seeServicingYour Airbag-Equipped Vehicle on page 2-72andAddingEquipment to Your Airbag-Equipped Vehicle onpage 2-73.
Headlamp Wiring
The headlamp wiring system has four individual fuses.An electrical overload will cause the lamps to go onand off, or in some cases to remain off. If this happens,have the headlamp wiring checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internalcircuit breaker. If the wiper motor overheats due toheavy snow, the wipers will stop until the motor coolsand will then restart.
A fuse powers the wiper motor. If the fuse blows, thereis an electrical problem. Be sure to have it fixed.
6-100

FusesUsage
9Engine Control Module (ECM),Powertrain Control Module (PCM)
10Climate Control System, InstrumentPanel Cluster Ignition 1
11Airbag System
12Horn
13Windshield Wiper
14Fog Lamps
15Right High-Beam Headlamp
16Left High-Beam Headlamp
17Left Low-Beam Headlamp
18Right Low-Beam Headlamp
19Windshield Washer Pump Motor
20Left Front Cornering Lamp
21Right Front Cornering Lamp
22Air Pump (J-Case)
23Antilock Brake System (ABS)(J-Case)
FusesUsage
24Starter (J-Case)
25Antilock Brake System (ABS)Motor (J-Case)
26Cooling Fan 2 (J-Case)
27Cooling Fan 1 (J-Case)
RelaysUsage
29Powertrain
30Starter
31Cooling Fan 2
32Cooling Fan 3
33Cooling Fan 1
34Air Conditioning Clutch
35Air Injection Reactor (AIR) Solenoid
36Ignition
37Air Pump
6-103

Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-88Audio Steering Wheel Controls . . . . . . . . . . . . . . . . . . . . 4-119Navigation/Radio System,see Navigation Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108Radio Reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-120Setting the Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-89Theft-Deterrent Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-119XM™ Satellite Radio Antenna System . . . . . . . . . . . 4-121Audio System(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92Automatic TransmissionFluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
B
Backglass Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-121Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34Electric Power Management . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . 4-30Inadvertent Power Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33Load Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32Run-Down Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34Belt Routing, Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11Bluetooth®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-108BrakeEmergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3Braking in Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22Bulb ReplacementFog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40Headlamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43High Intensity Discharge (HID) Lighting . . . . . . . . . . . 6-43Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-64
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11, 3-36CaliforniaPerchlorate Materials Requirements . . . . . . . . . . . . . . . . . 6-4Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iiiCapacities and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 6-109Carbon MonoxideEngine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
2

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

H
Hazard Warning Flashers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Headlamp Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-100HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . . . . 4-29Exterior Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10High Intensity Discharge (HID) Lighting . . . . . . . . . . . 6-43High/Low Beam Changer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29Wiper Activated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29HeatedSteering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4Heated Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5HeaterEngine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26Highbeam On Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-61High-Speed Operation, Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-56Highway Hypnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13Hill and Mountain Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14HoodChecking Things Under . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . 2-17
I
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23Inadvertent Power Battery Saver . . . . . . . . . . . . . . . . . . . . . . . 4-33Infants and Young Children, Restraints . . . . . . . . . . . . . . . 2-37Inflation - Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-54Instrument PanelBrightness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31Cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
J
Jump Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36
K
Keyless EntryRemote (RKE) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Keyless Entry System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
7