2008 CADILLAC STS air filter

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-6
Other Warning Devices...................................3-6
Horn.............................................................3-6
Power Tilt Wheel and Telescopic
Steering Column.........................................3-7
Heated Steering Wheel...................................3-7
Turn Signal/Multifunction Lever.........................3-8
Turn and Lane-Change Signals........................3-8
Headlamp High/Low-Beam Changer..................3-9
Forward Collision Alert (FCA) System..............3-10
Flash-to-Pass...............................................3-13
Windshield Wipers........................................3-14
Rainsense™ II Wipers...................................3-15
Windshield Washer.......................................3-16
Headlamp Washer........................................3-16
Cruise Control..............................................3-17
Adaptive Cruise Control.................................3-20
Headlamps..................................................3-33
Wiper Activated Headlamps............................3-37Headlamps on Reminder................................3-37
Daytime Running Lamps (DRL).......................3-37
Fog Lamps..................................................3-39
Twilight Sentinel
®..........................................3-39
Exterior Lighting Battery Saver........................3-40
Instrument Panel Brightness...........................3-41
Entry Lighting...............................................3-41
Parade Dimming...........................................3-41
Reading Lamps............................................3-42
Battery Load Management.............................3-42
Electric Power Management...........................3-42
Inadvertent Power Battery Saver.....................3-43
Head-Up Display (HUD).................................3-43
Accessory Power Outlet(s).............................3-46
Ashtray(s) and Cigarette Lighter......................3-47
Climate Controls............................................3-48
Dual Climate Control System..........................3-48
Outlet Adjustment.........................................3-54
Rear Climate Control System.........................3-54
Passenger Compartment Air Filter...................3-55
Section 3 Instrument Panel
3-1

The mode switch can also be used to select the defog
mode. Information on defogging and defrosting can
be found later in this section.
yAz(Fan):Press this switch to increase or
decrease the fan speed. Pressing this switch cancels
automatic operation and allows the operator to manually
select the amount of airow. Press AUTO to return to
automatic operation.
If the airow seems low when the fan speed is at the
highest setting, the passenger compartment air lter
may need to be replaced. For more information,
seePassenger Compartment Air Filter on page 3-55
andScheduled Maintenance on page 6-4.
h(Recirculation):Press this button to control the
air source for the climate control system. If in AUTO
mode, press this button once to select recirculation.
This mode keeps outside air from coming in the vehicle
and recirculates the air in the vehicle. It can be used
to prevent outside air and odors from entering the
vehicle or to help cool the air inside the vehicle
more quickly.
Recirculation is not available in the defrost mode
and shuts off when defog mode is selected. Both of
these features are designed to limit fogging in the
vehicle. If recirculation is selected during defog mode,
it automatically turns off after 10 minutes to limit
problems with fogging.In some conditions, using recirculation for long periods
of time can cause the air inside the vehicle to become
too dry or stuffy. To prevent this from happening,
after the air in the vehicle has cooled, select AUTO to
return to automatic climate control operation or push
the recirculation button again to select outside air.
Press this button a second time to select outside air.
:(Outside Air):This mode forces the system to
pull air from outside the vehicle. It can be used to bring
fresh air into the vehicle.
Air Quality Sensor:Your vehicle could have an air
quality sensor to help limit the climate control system
from pulling in some harmful exhaust fumes from older,
poorly running, or diesel-equipped vehicles that are
driving near you. This sensor, when active, monitors the
air quality in front of your vehicle and switches to air
recirculation when poor quality air is detected outside
your vehicle. Press the AUTO button on the climate
control to activate the air quality sensor. The word AUTO
comes on the center of the climate control display.
While the air quality sensor senses poor quality air,
the recirculation graphic displays.
3-50

Outlet Adjustment
Use the lever located in the center of each outlet to
change the direction of the airow, either side-to-side
or up and down. Use the thumbwheels to open or close
the outlets to adjust the airow.
Turn the thumbwheel towards the vehicle door to open
the outlets and allow the maximum amount of air to
enter your vehicle. Turn the thumbwheel towards
the center console to close the outlets and minimize
the amount of air entering the vehicle.
Operation Tips

Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the ow of air into your vehicle.
Use of non-GM approved hood deectors may
adversely affect the performance of the system.
Keep the path under the front seats clear of
objects to help circulate the air inside of your
vehicle more effectively.
If the airow seems low when the fan speed is at the
highest setting, the passenger compartment air lter
may need to be replaced. For more information, see
Passenger Compartment Air Filter on page 3-55.
Rear Climate Control System
Your vehicle has a rear climate control system.
The base model includes air outlets in the rear of
the center console for cooling and under-seat air
outlets for heating. The temperature, quantity, and
air delivery location is controlled automatically by
the front climate control system.
Some vehicles are equipped with an optional climate
control panel for the rear passenger, located on the
back of the center console.
The left knob controls the temperature of the air to
the rear passengers. Turning the knob to the left will
make the air cooler. Turning the knob to the right
will make the air warmer.
3-54

The right knob controls the air delivery to the rear
passengers. Turning the knob all the way to the left will
shut off airow to the rear passengers. Operating with
the rear air delivery off may make the entire vehicle
warm or cool less quickly. It may also increase the air
rush sound of the front system.
9(Off):This is the off position.
Y(Vent):This mode directs all the rear passenger
airow to the outlets in the console. This is the
normal position for cool down conditions.
\(Bi-Level):This mode directs airow to the
console outlets and the oor.
[(Floor):This mode directs all of the airow to the
oor. This is the normal position for warm up conditions.
The amount of airow to the rear passengers is
controlled automatically by the front climate control
system, regardless of optional equipment. Airow to
the rear system will be turned off when defrost is
selected on the front climate control panel to direct
air to clear the windshield.
Vehicles equipped with a rear climate control panel,
also, have heated rear seats. There are two buttons,
each with three indicator lights, located between thetwo climate control knobs on the rear climate control
panel, to control the rear heated seats. SeeHeated
Seats on page 1-7for additional information.
Be sure to keep the area under the front seats clear
of any objects so the air in your vehicle can circulate
effectively.
Passenger Compartment Air Filter
Your vehicle may be equipped with a passenger
compartment air lter. There are two types of lters
available. There is a standard dust lter that traps small
particles including pollen. There is, also, a dust/odor
lter available that traps dust and pollen and also uses
a charcoal element to help reduce many offensive
odors from entering your vehicle. The lter will need
to be changed periodically. For information on how
often to change the passenger compartment air lter,
seeScheduled Maintenance on page 6-4.
Notice:Driving without a passenger compartment
air lter in place can cause water and small particles,
like paper and leaves, to be pulled into your climate
control system which may cause damage to it. Make
sure you always replace the old lter with a new one.
3-55

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-3
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside
of Your Vehicle...........................................5-4
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-6
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-11
Engine Oil...................................................5-18
Engine Oil Life System..................................5-21
Engine Air Cleaner/Filter................................5-23
Automatic Transmission Fluid.........................5-25
Engine Coolant.............................................5-25
Coolant Surge Tank Pressure Cap..................5-29
Engine Overheating.......................................5-29
Overheated Engine Protection Operating Mode . . .5-31Cooling System............................................5-32
Power Steering Fluid.....................................5-39
Windshield Washer Fluid................................5-40
Brakes........................................................5-41
Battery........................................................5-44
Jump Starting...............................................5-45
All-Wheel Drive..............................................5-50
Rear Axle.......................................................5-51
Front Axle......................................................5-52
Headlamp Aiming...........................................5-53
Bulb Replacement..........................................5-54
High Intensity Discharge (HID) Lighting............5-54
Halogen Bulbs..............................................5-54
Back-Up Lamps............................................5-54
Replacement Bulbs.......................................5-55
Windshield Replacement.................................5-55
Windshield Wiper Blade Replacement..............5-55
Tires..............................................................5-57
Winter Tires.................................................5-58
Tire Sidewall Labeling...................................5-59
Tire Terminology and Denitions.....................5-62
Run-Flat Tires (STS-V)..................................5-65
Ination - Tire Pressure.................................5-66
High-Speed Operation...................................5-68
Section 5 Service and Appearance Care
5-1

After you have removed the sight shields (if equipped) on the 3.6L V6 engine, here is what you will see:
A. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-118.
B. Remote Negative (-) Terminal. SeeJump Starting on
page 5-45.
C. Remote Positive (+) Terminal. SeeJump Starting on
page 5-45.
D. Battery. SeeBattery on page 5-44.
E. Passenger Compartment Air Filter. SeePassenger
Compartment Air Filter on page 3-55.
F. Power Steering Fluid Reservoir. SeePower Steering
Fluid on page 5-39.
G. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-18.H. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 5-18.
I. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-41.
J. Engine Coolant Surge Tank and Pressure Cap. See
Coolant Surge Tank Pressure Cap on page 5-29
andCooling System on page 5-32.
K. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-23.
L. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-40.
5-13

After you have removed the sight shields (if equipped) on the 4.6L V8 engine, here is what you will see:
A. Remote Negative (-) Terminal. SeeJump Starting on
page 5-45.
B. Remote Positive (+) Terminal. SeeJump Starting on
page 5-45.
C. Battery. SeeBattery on page 5-44.
D. Passenger Compartment Air Filter. SeePassenger
Compartment Air Filter on page 3-55.
E. Power Steering Fluid Reservoir. SeePower Steering
Fluid on page 5-39.
F. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-18.
G. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 5-18.H. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-41.
I. Engine Coolant Surge Tank and Pressure Cap. See
Coolant Surge Tank Pressure Cap on page 5-29
andCooling System on page 5-32.
J. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-23.
K. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-118.
L. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-40.
5-15

After you have removed the sight shields (if equipped) on the 4.4L V8 STS-V engine, here is what you will see:
A. Underhood Fuse Block. SeeUnderhood Fuse Block
on page 5-118.
B. Remote Positive (+) Terminal. SeeJump Starting on
page 5-45.
C. Remote Negative (-) Terminal. SeeJump Starting on
page 5-45.
D. Battery. SeeBattery on page 5-44.
E. Passenger Compartment Air Filter. SeePassenger
Compartment Air Filter on page 3-55.
F. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on page 5-40.
G. Intercooler System Pressure Cap. SeeEngine
Coolant on page 5-25.
H. Power Steering Fluid Reservoir. SeePower Steering
Fluid on page 5-39.
I. Engine Oil Fill Cap. See “When to Add Engine Oil”
underEngine Oil on page 5-18.J. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 5-18.
K. Brake Master Cylinder Reservoir. See “Brake Fluid”
underBrakes on page 5-41.
L. Engine Coolant Surge Tank and Pressure Cap. See
Coolant Surge Tank Pressure Cap on page 5-29
andCooling System on page 5-32.
M. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 5-23.
If your vehicle is equipped with front compartment
underhood sight shields, before closing the hood be sure
to reinstall the sight shields. To reinstall the shields,
locate the tabs on the left and right sides and insert
them into the openings in the tower to tower brace. Then
insert the fasteners into the top of the shield and push
the fasteners back into place.
5-17