2009 CADILLAC STS warning

4. Lift the inboard edge of the deector to release the
retention tab.
5. Lift and slide the water deector toward the inboard
side and remove it.
6. The top edge of the lter should be visible. Reach
in and lift the lter out, pulling upward and toward
the front of the vehicle.
7. Insert the new air lter by sliding it back into place.
Make sure the arrow on the lter is pointing toward
the passenger compartment.
Reverse steps 1 through 3 to reinstall the water
deector, lter cover and the hood seal.Warning Lights, Gages, and
Indicators
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause an
expensive repair or replacement. Paying attention to
the warning lights and gages could prevent injury.
Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. Some
warning lights come on briey when the engine is
started to indicate they are working.
Gages can indicate when there may be or is a problem
with one of the vehicle’s functions. Often gages and
warning lights work together to indicate a problem with
the vehicle.
When one of the warning lights comes on and stays on
while driving, or when one of the gages shows there may
be a problem, check the section that explains what to do.
Follow this manual’s advice. Waiting to do repairs can be
costly and even dangerous.
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{CAUTION:
If the airbag readiness light stays on after the
vehicle is started or comes on while driving, it
means the airbag system might not be working
properly. The airbags in the vehicle might not
inate in a crash, or they could even inate
without a crash. To help avoid injury, have the
vehicle serviced right away.
If there is a problem with the airbag system, an airbag
Driver Information Center (DIC) message can also come
on. SeeDIC Warnings and Messages on page 3-79
for more information.
Passenger Airbag Status Indicator
Your vehicle has the passenger sensing system.
Your overhead console has a passenger airbag status
indicator.
When you start the vehicle, the passenger airbag status
indicator will light ON and OFF, or the symbol for on
and off, for several seconds as a system check. If you
use remote start to start your vehicle from a distance,
if your vehicle has this feature, you may not see
the system check.United States
Canada
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{CAUTION:
If the airbag readiness light in the instrument panel
cluster ever comes on and stays on, it means that
something may be wrong with the airbag system.
If this ever happens, have the vehicle serviced
promptly, because an adult-size person sitting in
the right front passenger’s seat may not have the
protection of the airbag(s). SeeAirbag Readiness
Light on page 3-58for more on this, including
important safety information.
Charging System Light
This light comes on briey
when the ignition key is
turned to START, but the
engine is not running, as a
check to show it is working.
If it does not, have the vehicle serviced by your
dealer/retailer.
The light should go out once the engine starts. If it stays
on, or comes on while driving, there could be a problem
with the charging system. A charging system message
in the Driver Information Center (DIC) can also appear.
SeeDIC Warnings and Messages on page 3-79for more
information. This light could indicate that there are
problems with a generator drive belt, or that there is an
electrical problem. Have it checked right away. If the
vehicle must be driven a short distance with the light
on, turn off accessories, such as the radio and air
conditioner.
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Brake System Warning Light
The vehicle’s hydraulic brake system is divided into
two parts. If one part is not working, the other part
can still work and stop the vehicle. For good braking
both parts need to be working.
If the warning light comes on, there is a brake problem.
Have the brake system inspected right away.
This light comes on briey when the engine is turned
on. If it does not come on then, have it xed so it will
be ready to warn if there is a problem.When the ignition is on, the brake system warning light
also comes on when the parking brake is set. The light
will stay on if the parking brake does not release fully. If it
stays on after the parking brake is fully released, it means
there is a brake problem.
If the light comes on while driving, pull off the road and
stop carefully. The pedal may be harder to push, or
the pedal may go closer to the oor. It may take longer
to stop. If the light is still on, have the vehicle towed
for service. SeeTowing Your Vehicle on page 4-29.
{CAUTION:
The brake system might not be working properly if
the brake system warning light is on. Driving with
the brake system warning light on can lead to a
crash. If the light is still on after the vehicle has
been pulled off the road and carefully stopped,
have the vehicle towed for service. United States
Canada
3-62

Antilock Brake System (ABS)
Warning Light
For vehicles with
the Antilock Brake
System (ABS), this light
comes on briey when
the engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light then goes off.
If the ABS light stays on, turn the ignition off. If the
light comes on while driving, stop as soon as it is safely
possible and turn the ignition off. Then start the engine
again to reset the system. If the ABS light stays on, or
comes on again while driving, the vehicle needs service.
If the regular brake system warning light is not on, the
vehicle still has brakes, but not antilock brakes. If the
regular brake system warning light is also on, the vehicle
does not have antilock brakes and there is a problem with
the regular brakes. SeeBrake System Warning Light on
page 3-62.
For vehicles with a Driver Information Center (DIC),
seeDIC Warnings and Messages on page 3-79for
all brake related DIC messages.
Traction Control System (TCS)
Warning Light
The TCS warning light
comes on briey when
the engine is started.
If it does not, have the vehicle serviced by your
dealer/retailer.
If the Traction Control System (TCS) warning light
comes on and stays on, there may be a problem with
the TCS.
The light also comes on if the TCS is turned off using
the traction control on/off button located on the console.
If this light stays on or comes on while driving, pull
off the road as soon as possible and stop carefully.
Turn the engine off and then restart it. If the light still
stays on or comes back on again while driving, the
vehicle needs service. Have the TCS inspected as
soon as possible. SeeTraction Control System (TCS)
on page 4-10andStabiliTrak
®System on page 4-6
for more information.
Also seeCompetitive Driving Mode on page 4-11for
more information.
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Lane Departure Warning Light
For vehicles with the lane
departure warning system,
this light briey comes
on green, while starting
the vehicle, to indicate
that it is working.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light will then go off.
This light also comes on green if the system detects a
left or right lane marking. It ashes, changes to amber
and three beeps sound if a detected lane marking is
crossed without using a turn signal. For more information,
see the Index in the Navigation Manual.
Engine Coolant Temperature
Warning Light
The engine coolant
temperature warning
light comes on when
the engine is very hot.
This light also comes on briey when the vehicle is
started.
If the light does not go out or comes on and stays on
while driving, there may be a problem with the cooling
system. Driving with engine coolant temperature light on
could cause the vehicle to overheat, seeOverheated
Engine Protection Operating Mode on page 5-36.
SeeEngine Overheating on page 5-34andDIC
Warnings and Messages on page 3-79for more
information.
3-64

Engine Coolant Temperature Gage
This gage shows
the engine coolant
temperature.
It can be used to see when the engine has warmed
up and to make sure the cooling system is operating
properly. If the gage pointer moves into the shaded area,
the engine coolant is too hot and the engine coolant
temperature warning light comes on. SeeEngine
Overheating on page 5-34for more information.
Tire Pressure Light
For vehicles with a tire
pressure light, this light
comes on briey when
the engine is started and
provides information about
tire pressures and the Tire
Pressure Monitoring
System.
When the Light is On Steady
This indicates that one or more of the tires is signicantly
underinated.
A tire pressure message in the Driver Information
Center (DIC), can accompany the light. SeeDIC
Warnings and Messages on page 3-79for more
information. Stop and check the tires as soon as it is
safe to do so. If a tire is underinated, inate to the
proper pressure. SeeTires on page 5-54for more
information.
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Fuel Gage
The fuel gage shows
approximately how much
fuel is in the fuel tank.
It works only when
the engine is on.
An arrow on the fuel gage indicates the side of the
vehicle the fuel door is on.If the fuel supply gets low, the “FUEL LEVEL LOW”
message appears on the Driver Information Center (DIC)
and a single chime sounds. SeeDIC Warnings and
Messages on page 3-79for more information.
All of the following situations 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 full.
The gage may change when you turn, stop quickly
or accelerate quickly.
It takes a little more or less fuel to ll the tank than
the gage indicated. For example, the gage may
have indicated that the tank was half full, but
it actually took a little more or less than half the
tank’s capacity to ll the tank.
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