check engine light CADILLAC XLR V 2006 1.G User Guide

Gasoline Octane
If your vehicle has the 4.6L V8 engine (VIN Code A),
use premium unleaded gasoline with a posted octane
rating of 91 or higher. You may also use regular
unleaded gasoline rated at 87 octane or higher, but
your vehicle’s acceleration may be slightly reduced,
and you may notice a slight audible knocking noise,
commonly referred to as spark knock. If the octane
is less than 87, you may 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 might damage your engine. If you are
using gasoline rated at 87 octane or higher and you
hear heavy knocking, your engine needs service.
If your vehicle has the 4.4L V8 engine (VIN Code D),
use premium unleaded gasoline with a posted
octane rating of 91 or higher. For best performance,
use premium unleaded gasoline with a posted octane
rating of 93. In an emergency, you can use regular
unleaded gasoline with an octane rating of 87 or
higher. If 87 octane fuel is used, do not perform any
aggressive driving maneuvers such as wide open throttle
applications. You may also hear audible spark knock
during acceleration. Rell your tank with premium fuel as
soon as possible to avoid damaging your engine. If
you are using gasoline rated at 91 octane or higher and
you hear heavy knocking, your 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 6-6
for 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 3-58. 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.
6-5

Follow these steps to reinstall the covers to the engine
air cleaner/lter housings:
1. Align the four tabs located on the back of the cover
with the three slots on the back of the housing.
2. Push the cover slightly down and towards the
engine to engage the tabs in the slots and align the
two wing screws.
3. Engage and tighten the two clasps on the top of the
engine air cleaner/lter cover.
{CAUTION:
Operating the engine with the air cleaner/lter
off can cause you or others to be burned.
The air cleaner not only cleans the air; it helps
to stop ames if the engine backres. If it is
not there and the engine backres, you could
be burned. Do not drive with it off, and be
careful working on the engine with the air
cleaner/lter off.
Notice:If the air cleaner/lter is off, a backre can
cause a damaging engine re. And, dirt can easily get
into your engine, which will damage it. Always have
the air cleaner/lter in place when you are driving.
Automatic Transmission Fluid
How to Check Automatic
Transmission Fluid
It is not necessary to check the transmission uid level.
A transmission uid leak is the only reason for uid
loss. If a leak occurs, take the vehicle to the dealership
service department and have it repaired as soon as
possible.
There is a special procedure for checking and changing
the transmission uid. Because this procedure is
difficult, you should have this done at the dealership
service department. Contact your dealer for additional
information or the procedure can be found in the service
manual. To purchase a service manual, seeService
Publications Ordering Information on page 8-14.
Notice:Use of the incorrect automatic transmission
uid may damage your vehicle, and the damages
may not be covered by your warranty. Always
use the automatic transmission uid listed in
Recommended Fluids and Lubricants on page 7-11.
Change the uid and lter at the intervals listed in
Additional Required Services on page 7-6, and be sure
to use the uid listed inRecommended Fluids and
Lubricants on page 7-11.
6-21

Notice:If you try to start your vehicle by pushing
or pulling it, you could damage your vehicle. Do not
push or pull your vehicle to start it; instead, use
the jump starting procedure in this manual to start
your vehicle when the battery has run down.
1. Check the other vehicle. It must have a 12-volt
battery with a negative ground system.
Notice:If the other vehicle’s system is not a 12-volt
system with a negative ground, both vehicles can
be damaged. Only use vehicles with 12-volt systems
with negative grounds to jump start your vehicle.
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles are not touching
each other. If they are, it could cause a ground
connection you do not want. You would not be able
to start your vehicle, and the bad grounding
could damage the electrical systems.
To avoid the possibility of the vehicles rolling, set
the parking brake rmly on both vehicles involved
in the jump start procedure. Put an automatic
transmission in PARK (P) or a manual transmission
in NEUTRAL before setting the parking brake.Notice:If you leave your radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered
by your warranty. Always turn off your radio and
other accessories when jump starting your vehicle.
3. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or the accessory power outlet. Turn off
the radio and all lamps that are not needed.
This will avoid sparks and help save both batteries.
And it could save the radio!
4. Open the hoods and locate the batteries. Find the
positive (+) and negative (−) terminal locations on
each vehicle. SeeEngine Compartment Overview
on page 6-12for more information on location.
{CAUTION:
An electric fan can start up even when the
engine is not running and can injure you.
Keep hands, clothing and tools away from
any underhood electric fan.
6-40

{CAUTION:
Using a match near a battery can cause battery
gas to explode. People have been hurt doing
this, and some have been blinded. Use a
ashlight if you need more light.
Be sure the battery has enough water. You do
not need to add water to the battery installed
in your new vehicle. But if a battery has ller
caps, be sure the right amount of uid is there.
If it is low, add water to take care of that rst.
If you do not, explosive gas could be present.
Battery uid contains acid that can burn you.
Do not get it on you. If you accidentally get it
in your eyes or on your skin, ush the place
with water and get medical help immediately.
{CAUTION:
Fans or other moving engine parts can injure
you badly. Keep your hands away from moving
parts once the engine is running.
5. Check that the jumper cables do not have loose
or missing insulation. If they do, you could get a
shock. The vehicles could be damaged too.
Before you connect the cables, here are some
basic things you should know. Positive (+) will go
to positive (+) or to a remote positive (+) terminal
if the vehicle has one. Negative (−) will go to a
heavy, unpainted metal engine part or to a remote
negative (−) terminal if the vehicle has one.
Do not connect positive (+) to negative (−)oryou
will get a short that would damage the battery
and maybe other parts too. And do not connect the
negative (−) cable to the negative (−) terminal on
the dead battery because this can cause sparks.
6-41

Remove the valve cap from the tire valve stem. Press
the tire gage rmly onto the valve to get a pressure
measurement. If the cold tire ination pressure matches
the recommended pressure on the Tire and Loading
Information label, no further adjustment is necessary.
If the ination pressure is low, add air until you reach the
recommended amount.
If you overll the tire, release air by pushing on the
metal stem in the center of the tire valve. Recheck the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
Tire Pressure Monitor (TPM)
Your vehicle has a Tire Pressure Monitor (TPM) that
sends tire pressure information to the Driver Information
Center (DIC). Using the DIC control buttons, the
driver is able to check tire pressure levels in all four
road tires. SeeTire Pressure Monitor System on
page 6-59andDIC Controls and Displays on page 3-64
for additional information.
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) on your
vehicle, uses radio and sensor technology to check tire
pressure levels. Sensors, mounted on each tire and
wheel assembly transmit tire pressure readings to
a receiver located in the vehicle. The TPMS sensors
transmit tire pressure readings once every 60 seconds
while the vehicle is being driven and once every
60 minutes when the vehicle is stationary for more than
15 minutes. Using the Driver Information Center
(DIC), tire pressure levels can be viewed by the driver.
The TPMS also uses the DIC to warn the driver
when air pressure, in one or more tires, falls below
25 psi (172 kPa) or is above 42 psi (290 kPa).
For additional information and details about the
DIC operation and displays seeDIC Controls and
Displays on page 3-64andDIC Warnings and
Messages on page 3-67.
A low tire pressure warning light also appears on the
instrument panel cluster when a low tire condition exists.
The DIC message, CHECK TIRE PRESSURE and
the low tire pressure warning light will be shown each
time the engine is started and stays on until the low tire
condition is corrected.
6-59

Maintenance Footnotes
(a)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.
(b)Visually inspect wiper blades for wear or cracking.
Replace wiper blades that appear worn or damaged
or that streak or miss areas of the windshield.
(c)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors, and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced. Also look for any opened or broken airbag
coverings, and have them repaired or replaced.
The airbag system does not need regular maintenance.
(d)Lubricate the trunk key lock cylinder. Lubricate all
body door hinges. Lubricate all hinges and latches,
including those for the hood, trunk, console door, and
any folding seat hardware. More frequent lubrication
may be required when exposed to a corrosive
environment. Applying silicone grease on weatherstrips
with a clean cloth will make them last longer, seal
better, and not stick or squeak.(e)If you drive regularly under dusty conditions, the
lter may require replacement more often.
(f)Change automatic transmission uid and lter if the
vehicle is mainly driven under one or more of these
conditions:
In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
Uses such as high performance operation.
(g)Drain, ush, and rell cooling system. This service
can be complex; you should have your dealer perform
this service. See Engine Coolant on page 6-22 for
what to use. Inspect hoses. Clean radiator, condenser,
pressure cap, and ller neck. Pressure test the
cooling system and pressure cap.
(h)If you drive regularly under dusty conditions, inspect
the lter at each engine oil change.
(j)Visually inspect belt for fraying, excessive cracks, or
obvious damage. Replace belt if necessary.
7-7

Audio System(s) (cont.)
Understanding Radio Reception.....................3-84
XM™ Satellite Radio Antenna System............3-86
Automatic Door Lock.......................................2-11
Automatic Transmission
Fluid..........................................................6-21
Operation...................................................2-25
Avoid Point/Area, Edit......................................4-25
B
Battery..........................................................6-38
Exterior Lighting Battery Saver......................3-33
Run-Down Protection...................................3-34
Before Leaving on a Long Trip.........................5-24
Brake
Anti-Lock Brake System (ABS)........................ 5-7
Emergencies................................................ 5-9
Parking......................................................2-29
System Warning Light..................................3-54
Brakes..........................................................6-35
Braking........................................................... 5-6
Braking in Emergencies..................................... 5-9
Break-In, New Vehicle.....................................2-20
Bulb Replacement...........................................6-48
Headlamp Aiming........................................6-45
Buying New Tires...........................................6-64
C
California Fuel.................................................. 6-5
California Proposition 65 Warning....................... 6-3
Canadian Owners................................................ ii
Capacities and Specications............................6-92
Carbon Monoxide...................2-12, 2-34, 5-27, 5-37
Care of
Safety Belts................................................6-80
Your CD Player...........................................3-86
Your CDs ...................................................3-86
CD
Player........................................................4-69
Six-Disc Changer.........................................4-66
CD/DVD Player..............................................4-69
Center Console Storage Area...........................2-45
Chains, Tire...................................................6-70
Check
Engine Light...............................................3-58
Checking Things Under the Hood......................6-10
Chemical Paint Spotting...................................6-83
Child Restraints
Child Restraint Systems...............................1-23
Infants and Young Children...........................1-20
Lower Anchors and Tethers for Children..........1-27
Older Children.............................................1-18
Securing a Child Restraint in the Passenger
Seat Position...........................................1-28
2

D
Database Coverage Explanations......................4-50
Daytime Running Lamps..................................3-30
Defensive Driving............................................. 5-2
Diversity Antenna System.................................3-86
Doing Your Own Service Work........................... 6-4
Door
Automatic Door Lock....................................2-11
Locks.......................................................... 2-9
Power Door Locks.......................................2-11
Programmable Automatic Door Unlock............2-12
Driver
Position, Safety Belt.....................................1-10
Driver Information Center (DIC).........................3-64
DIC Controls and Displays............................3-64
DIC Vehicle Personalization..........................3-78
DIC Warnings and Messages........................3-67
Other Messages..........................................3-77
Driving
At Night.....................................................5-19
City ...........................................................5-22
Defensive..................................................... 5-2
Drunken....................................................... 5-3
Freeway.....................................................5-23
Hill and Mountain Roads..............................5-26
In Rain and on Wet Roads...........................5-20
Rocking Your Vehicle to Get it Out.................5-32
Winter........................................................5-27Dual Climate Control System............................3-41
DVD
Player........................................................4-69
E
Edit
Avoid Point/Area..........................................4-25
Memory Point.............................................4-19
Waypoint....................................................4-23
Electrical System
Add-On Equipment......................................6-86
Fuses and Circuit Breakers...........................6-86
Instrument Panel Fuse Block.........................6-87
Power Windows and Other Power Options......6-86
Underhood Fuse Block.................................6-89
Windshield Wiper Fuses...............................6-86
Engine
Air Cleaner/Filter.........................................6-20
Battery.......................................................6-38
Check and Service Engine Soon Light............3-58
Coolant......................................................6-22
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-57
Drive Belt Routing.......................................7-14
Engine Compartment Overview......................6-12
Exhaust.....................................................2-34
Oil .............................................................6-15
4