2008 CADILLAC STS steering

If a Tire Goes Flat
It is unusual for a tire to blowout while you are driving,
especially if you maintain your tires properly. See
Tires on page 5-57. If air goes out of a tire, It is much
more likely to leak out slowly. But if you should ever
have a blowout, here are a few tips about what to expect
and what to do:
If a front tire fails, the at tire will create a drag that
pulls the vehicle toward that side. Take your foot off the
accelerator pedal and grip the steering wheel rmly.
Steer to maintain lane position, and then gently brake to
a stop well out of the traffic lane.
A rear blowout, particularly on a curve, acts much like a
skid and may require the same correction you would
use in a skid. In any rear blowout, remove your foot from
the accelerator pedal. Get the vehicle under control
by steering the way you want the vehicle to go. It may
be very bumpy and noisy, but you can still steer. Gently
brake to a stop, well off the road if possible.
If a tire goes at, and your vehicle has a compact spare
tire, seeChanging a Flat Tire on page 5-96. This
information shows you how to use your vehicle’s tire
changing equipment and how to change a at tire safely.{CAUTION:
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous without
the appropriate safety equipment and training.
The jack provided with your vehicle is
designed only for changing a at tire. If it is
used for anything else, you or others could be
badly injured or killed if the vehicle slips off
the jack. Use the jack provided with your
vehicle only for changing a at tire.
If your vehicle has 255/45ZR18 size tires, there is no
spare tire, jack, or tire changing equipment. A tire inator
kit, included with your vehicle, may be used to seal
small punctures in the tread area of the tire. SeeTire
Sealant and Compressor Kit on page 5-87.
5-86

The underhood fuse block is located in the front of the
engine compartment on the passenger’s side of the
vehicle. SeeEngine Compartment Overview on
page 5-11for more information on location and removal
procedure for the front compartment underhood
sights shields.
To access the fuses, push in the tabs located on each
side of the fuse block cover, then lift the cover off.
Notice:Spilling liquid on any electrical components
on your vehicle may damage it. Always keep the
covers on any electrical component.
Fuses JCase Usage
ABS MTRABS Module- ABS
Module-StabiliTrak
®
AFS Active Front Steering
BLWR Blower Motor
FAN 1 Cooling Fan-Low Speed
FAN 2 Cooling Fan-High Speed
LPDB 1 Driver Side Rear Fuse Block
LPDB 2 Driver Side Rear Fuse Block
RPDB 1 Passenger Side Rear Fuse Block
RPDB 2 Passenger Side Rear Fuse Block
SPARE Spare
SPARE Spare
STRTR Starter
Fuses Mini Usage
A/C CLTCH Air Conditioning Compressor Clutch
ABS ABS Module-StabiliTrak
®
ABS IGN Antilock Brake Controller
AUX OUTLET Rear Accessory Power Outlet
BRK VAC
PUMPBrake Vacuum Pump
CCP Climate Control Panel
CCP/RLY
COILSClimate Control Panel, Headlamp
Level Control, Active Cruise Control,
Relay Coils, Starter, Front Blower
ECM 1 Engine Control Module (ECM)
ECM/TCM
BATTECM, Transmission Control
Module (TCM)
ECM/TCM IGNECM, TCM, Instrument Panel
Cluster
EKM/I/P MDLEasy Key Module (EKM), Instrument
Panel Module (I/P MDL)
EVEN COILSEven Ignition Coils, Even Fuel
Injectors
FOG LAMP Front Fog Lamps
FRT PWR
OUTLETFront Accessory Power Outlet
FUEL COOL Fuel Cooling
HORN Horn
HTD
WASH/AQSHeated Headlamp Washer, Air
Quality Sensor
5-119

Fuses Mini Usage
HUDHeads-Up Display, Steering Column
Switch
I/BEAM IntelliBeam Relay
I/P MDL/ALDLInstrument Panel Module, Assembly
Line Data Link Connector
LIC DIMLicense Plate, Instrument Panel
Dimming
LT HI BEAM Driver Side High Beam Headlamp
LT LO BEAM Driver Side Low Beam Headlamp
LT PRKDriver Side Park Lamp/Driver Side
Taillamp
ODD COILSOdd Ignition Coils, Odd Fuel
Injectors
POST
O2 SNSRPost Oxygen Sensor
PRE O2 SNSR Pre Oxygen Sensor, CAM Sensors
RAIN
SNSR/TPMRain Sensor, Relay Coil:
Headlamp Wash
RT HI BEAMPassenger Side High Beam
Headlamp
RT LO BEAMPassenger Side Low Beam
Headlamp
RT PRKPassenger Side Park Lamp,
Passenger Side Taillamp
SPARE Spare
SPARE SpareFuses Mini Usage
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
SPARE Spare
V/CHKInstrument Panel Module-Voltage
Check
WPR Wipe/Wash Module Assembly
WPR SW/VICS Rain Sensor, Wiper Switch
Relays Usage
A/C CMPRSR
CLTCHAir Conditioning Compressor Clutch
ACCYAccessory Rain Sensor, Headlamp
Washer Relay Coil, Windshield
Wiper/Washer Module
BRK
VAC PUMPBrake Vacuum Pump
FAN S/P Cooling Fan Series/Parallel
FOG LAMP Fog Lamps
FRT BLWR Front Blower Motor
FUEL COOL Fuel Cooling Pump
HI BEAM High Beam Headlamp
HI FAN SPD Cooling Fan High Speed
HORN Horn
5-120

Passenger’s Side
Fuses Usage
AIRBAG/IGNSensing and Diagnostic Monitor,
Automatic Occupant Sensor,
Passenger Supplemental Inatable
Restraint
CNSTR/VENT Canister Vent Solenoid
DIFF PUMP Rear Differential PumpFuses Usage
FRT PDMFront Passenger Door Module, Right
Power Subwoofer
FUEL PUMP Fuel Pump
HTD STR Heated Steering Wheel
RF
HTD/SEAT/XMFront Passenger Heated Seat,
S-Band™ Antenna
5-126

Fuses Usage
RDO/ONSTAR Radio, OnStar®
INT LAMP Interior Lamps
LT TRN/LDWLeft Turn Signal, Lane Departure
Warning (Option)
REAR DEFOG Rear Defogger
REAR/FOG Rear Fog Lamps (Option)
RIM Rear Integration Module
RIM /RPA /
ISRVM /CLMRear Integration Module, Rear
Parking Aid, Inside Rearview Mirror,
Column Lock Module, Power
Sounder, Active Front Steering
(AFS), Supervisory Control Module
RUN/CRNKUHBEC Run, CRNK Relay Coil,
Rear Fog Lamp Relay Coil
S/ROOF Sun Roof Module (Option)
SPARE Spare
STOP LAMPS Stop Lamps
RT TRN/SZBARight Turn Signal, Side Blind Zone
Alert (Option)
Relays Usage
DIFF PUMP Rear Differential Pump (Option)
FUEL PUMP Fuel Pump
INT LAMP Interior Lamps
Relays Usage
REAR DEFOG Rear Defogger
REAR/FOG Rear Fog Lamps (Option)
RUN/CRNK Ignition 1
SPARE Spare
STOP LAMP Stop Lamp
Circuit
Breakers Usage
WINDOW
MTRSPower Window Motors Circuit
Breaker
Diodes Usage
TRUNK DIODE Trunk Release
Joint
Connector Usage
J/C Splice Pack (Blue)
5-127

If the engine oil life system is ever reset accidentally,
you must service your vehicle within 3,000 miles
(5 000 km) since your last service. Remember to
reset the oil life system whenever the oil is changed.
SeeEngine Oil Life System on page 5-21for
information on the Engine Oil Life System and
resetting the system.
When the CHANGE ENGINE OIL SOON message
appears, the following services, checks, and inspections
are required:
❑Change engine oil and lter. SeeEngine Oil on
page 5-18. Reset oil life system. SeeEngine Oil Life
System on page 5-21.An Emission Control Service.
❑Visually check for any leaks or damage.
See footnote (k).
❑Inspect engine air cleaner lter. If necessary, replace
lter. SeeEngine Air Cleaner/Filter on page 5-23.
See footnote (m).❑Check tires for ination pressures and wear. SeeTires
on page 5-57. If tire rotation is recommended for your
vehicle, rotate tires. SeeTire Inspection and Rotation
on page 5-73and “Tire Wear Inspection” inAt Least
Once a Month on page 6-10.
❑Inspect brake system.See footnote (a).
❑Check engine coolant and windshield washer uid
levels. If you have the 4.4L V8 supercharged engine,
check intercooler uid level. Add uid as needed.
❑Perform any needed additional services.
See “Additional Required Services” in this section.
❑Inspect suspension and steering components.
See footnote (b).
❑Inspect engine cooling system.See footnote (c).
❑Inspect wiper blades.See footnote (d).
❑Inspect restraint system components.
See footnote (e).
❑Lubricate body components.See footnote (f).
6-5

Maintenance Footnotes
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chafing, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chafing, etc.
(c)Visually inspect hoses and have them replaced if
they are cracked, swollen, or deteriorated. Inspect
all pipes, fittings, and clamps; replace with genuine parts
as needed. To help ensure proper operation, a pressure
test of the cooling system and pressure cap and
cleaning the outside of the radiator and air conditioning
condenser is recommended at least once a year.
(d)Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and wiper blades,
if contaminated. Replace wiper blades that are worn
or damaged. See Windshield Wiper Blade Replacement
on page 5-55 and Windshield and Wiper Blades on
page 5-112 for more information.(e)Make sure the safety belt reminder light and safety
belt assemblies 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 see Checking
the Restraint Systems on page 1-66.
(f)Lubricate all key lock cylinders. Lubricate all hinges
and latches, including those for the hood, rear
compartment, glove box door, and console door. 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.
(g)If you drive regularly under dusty conditions, the
filter may require replacement more often.
(h)Change automatic transmission fluid and filter 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.
When doing frequent trailer towing.
Uses such as limousine service.
Uses such as high performance operation.
6-8

Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number, or specication can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine OilThe engine requires a special
engine oil meeting GM Standard
GM4718M. Oils meeting this
standard can be identied as
synthetic, and should also be
identied with the American
Petroleum Institute (API) Certied
for Gasoline Engines starburst
symbol. However, not all synthetic
API oils with the starburst symbol
will meet this GM standard.
Look for and use only oil that meets
GM Standard GM4718M. For the
proper viscosity, seeEngine Oil
on page 5-18.
Usage Fluid/Lubricant
Engine Cooling
System50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-25.
Intercooler
System
(4.4L V8
Supercharged
engine)50/50 mixture of clean,
drinkable water and use only
DEX-COOL
®Coolant.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherOptikleen
®Washer Solvent.
Parking Brake
Cable GuidesChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
6-13