2008 CADILLAC XLR fuel cap

Service and Appearance Care.......................... 6-1
Service
..................................................... 6-3
Fuel
......................................................... 6-5
Checking Things Under the Hood
...............6-10
Rear Axle
...............................................6-46
Headlamp Aiming
.....................................6-47
Bulb Replacement
....................................6-50
Windshield Replacement
...........................6-50
Windshield Wiper Blade Replacement
.........6-50
Tires
......................................................6-52
Appearance Care
.....................................6-80Vehicle Identication
.................................6-89
Electrical System
......................................6-89
Capacities and Specications
.....................6-97
Maintenance Schedule..................................... 7-1
Maintenance Schedule
................................ 7-2
Customer Assistance Information.................... 8-1
Customer Assistance and Information
........... 8-2
Reporting Safety Defects
...........................8-15
Vehicle Data Recording and Privacy
...........8-17
Index................................................................ 1

If the Light Is Flashing
The following can prevent more serious damage to
your vehicle:
Reduce vehicle speed.
Avoid hard accelerations.
Avoid steep uphill grades.
If the light stops ashing and remains on steady,
see “If the Light Is On Steady” following.
If the light continues to ash, when it is safe to do so,
stop the vehicle. Find a safe place to park the vehicle.
Turn the engine off, wait at least 10 seconds and restart
the engine. If the light remains on steady, see “If the
Light Is On Steady” following. If the light is still ashing,
follow the previous steps, and see your dealer/retailer
for service as soon as possible.
If the Light Is On Steady
You might be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully install the
cap. SeeFilling the Tank on page 6-7. The diagnostic
system can determine if the fuel cap has been left off orimproperly installed. A loose or missing fuel cap allows
fuel to evaporate into the atmosphere. A few driving trips
with the cap properly installed should turn the light off.
Did you just drive through a deep puddle of water?
If so, your vehicle’s electrical system might be wet. The
condition is usually corrected when the electrical system
dries out. A few driving trips should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane on page 6-5. Poor fuel quality causes
the engine not to run as efficiently as designed. You
might notice this as stalling after start-up, stalling when
you put the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration — these
conditions might go away once the engine is warmed up.
This will be detected by the system and cause the
light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least
one full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn
off, your dealer/retailer can check the vehicle. Your
dealer/retailer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that might have developed.
3-55

Fuel Gage
Your fuel gage tells
you about how much
fuel you have left when
the ignition is on.
When the needle approaches the low fuel symbol,
LOW FUEL will appear on the Driver Information
Center (DIC) display. At this time, you still have a
little fuel left, but you should get more soon.Press RESET to acknowledge a DIC message(s).
Pressing RESET will also turn off a DIC message
but the LOW FUEL message will come on again in
10 minutes if you have not added fuel to the vehicle.
Here are ve things that some owners ask about.
All these things are normal and do not indicate that
anything is wrong with the fuel gage.
At the gas station, the gas pump shuts off before
the gage reads the full symbol.
It takes more (or less) fuel to ll up than the
gage reads. For example, the gage reads half full,
but it took more (or less) than half of the tank’s
capacity to t it.
The gage pointer may move while cornering,
braking or speeding up.
The gage may not indicate the tank is empty when
the ignition is turned off.
The gage reading may change slightly within the
rst several minutes after starting the vehicle.
3-59

If the driver remains unbuckled when the ignition is
on and the vehicle is in motion, the reminder will
be repeated. If the driver’s safety belt is already buckled,
this message and chime will not come on.
This message is an additional reminder to the Safety
Belt Reminder Light in the instrument panel cluster.
SeeSafety Belt Reminders on page 3-46for more
information.
CHANGE OIL NOW
This message displays when the life of the engine oil
has expired. SeeScheduled Maintenance on page 7-4.
After an oil change, the Oil Life Indicator must be
reset. SeeOil Life Indicator on page 3-80andEngine
Oil Life System on page 6-20.
CHARGE SYSTEM FAULT
This message displays when a problem with the
charging system has been detected. Have your vehicle
serviced by your dealer/retailer.
CHECK GAS CAP
This message displays if the fuel cap has not been
fully tightened. Check the fuel cap to make sure that
it is on properly.
CLEAN RADAR CRUISE
If your vehicle has this feature, this message displays
when the Adaptive Cruise Control (ACC) system is
disabled because the radar is blocked and cannot
detect vehicles in your path. It may also activate during
heavy rain or due to road spray. To clean the system,
seeAdaptive Cruise Control on page 3-15.
CLOSE CARGO DIVIDER
This message displays if the cargo divider is not in
place. Open the trunk and make sure the cargo divider
is secure and no objects are on the divider. See
Rear Storage Area on page 2-53for more information.
COOLANT OVER TEMP (Temperature)
This message displays when the engine coolant
temperature is too hot. Stop and allow your vehicle to
idle in PARK (P) until it cools down and the message
is removed. Do not increase engine speed above
a normal idle. If it does not cool down, turn off the
engine and have your vehicle serviced by your
dealer/retailer before driving it again. Severe engine
damage can result from an overheated engine.
SeeEngine Overheating on page 6-27.
3-64

Certication Label
A vehicle specic Certication label is attached to
the rear edge of the driver’s door. It tells you
the gross weight capacity of your vehicle, called
the Gross Vehicle Weight Rating (GVWR).
The GVWR includes the weight of the vehicle, all
occupants, fuel, and cargo. Never exceed the
GVWR for your vehicle, or the Gross Axle Weight
Rating (GAWR) for either the front or rear axle.And, if you do have a heavy load, you should
spread it out.
{CAUTION:
Do not load your vehicle any heavier than
the Gross Vehicle Weight Rating (GVWR),
or either the maximum front or rear Gross
Axle Weight Rating (GAWR). If you do,
parts on your vehicle can break, and it
can change the way your vehicle handles.
These could cause you to lose control
and crash. Also, overloading can shorten
the life of your vehicle.
Notice:Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.
5-26

Service............................................................6-3
Accessories and Modications..........................6-3
California Proposition 65 Warning.....................6-3
California Perchlorate Materials Requirements......6-4
Doing Your Own Service Work.........................6-4
Adding Equipment to the Outside of
Your Vehicle..............................................6-4
Fuel................................................................6-5
Gasoline Octane............................................6-5
Gasoline Specications....................................6-5
California Fuel...............................................6-6
Additives.......................................................6-6
Fuels in Foreign Countries...............................6-7
Filling the Tank..............................................6-7
Filling a Portable Fuel Container.....................6-10
Checking Things Under the Hood....................6-10
Hood Release..............................................6-11
Engine Compartment Overview.......................6-12
Engine Oil...................................................6-16
Engine Oil Life System..................................6-20
Engine Air Cleaner/Filter................................6-22
Automatic Transmission Fluid.........................6-24
Engine Coolant.............................................6-24
Coolant Surge Tank Pressure Cap..................6-27Engine Overheating.......................................6-27
Overheated Engine Protection
Operating Mode........................................6-29
Cooling System............................................6-30
Power Steering Fluid.....................................6-35
Windshield Washer Fluid................................6-36
Brakes........................................................6-37
Battery........................................................6-40
Jump Starting...............................................6-41
Rear Axle.......................................................6-46
Headlamp Aiming...........................................6-47
Headlamp Vertical Aiming..............................6-48
Bulb Replacement..........................................6-50
Windshield Replacement.................................6-50
Windshield Wiper Blade Replacement..............6-50
Tires..............................................................6-52
Winter Tires (XLR-V).....................................6-53
Tire Sidewall Labeling...................................6-54
Tire Terminology and Denitions.....................6-56
Run-Flat Tires..............................................6-58
Ination - Tire Pressure.................................6-60
Tire Pressure Monitor System.........................6-61
Tire Pressure Monitor Operation.....................6-63
Section 6 Service and Appearance Care
6-1

Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel might be
hard to nd. Never use leaded gasoline or any other
fuel not recommended in the previous text on fuel.
Costly repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
Filling the Tank
{CAUTION:
Fuel vapor burns violently and a fuel re can
cause bad injuries. To help avoid injuries to
you and others, read and follow all the
instructions on the pump island. Turn off your
engine when you are refueling. Do not smoke
if you are near fuel or refueling your vehicle.
Do not use cellular phones. Keep sparks,
ames, and smoking materials away from fuel.
CAUTION: (Continued)
CAUTION: (Continued)
Do not leave the fuel pump unattended when
refueling your vehicle. This is against the law
in some places. Do not re-enter the vehicle
while pumping fuel. Keep children away from
the fuel pump; never let children pump fuel.
The tethered fuel cap is located behind a hinged fuel
door on the driver’s side of the vehicle.
6-7

The fuel door release
button is located on the
left side of the instrument
panel. The button only
works when the vehicle is
in PARK (P) or
NEUTRAL (N) and the
valet lockout button
is in OFF.
An alternate fuel door
release is located inside
the trunk behind a panel on
the driver’s side of the
vehicle. Pull the handle to
release the fuel door.To remove the fuel cap, turn it slowly counterclockwise.
The fuel cap has a spring in it; if the cap is released
too soon, it will spring back to the right.
While refueling, hang the tethered fuel cap from the
hook on the fuel door.
{CAUTION:
Fuel can spray out on you if you open the fuel
cap too quickly. If you spill fuel and then
something ignites it, you could be badly burned.
This spray can happen if your tank is nearly full,
and is more likely in hot weather. Open the fuel
cap slowly and wait for any hiss noise to stop.
Then unscrew the cap all the way.
6-8