engine CADILLAC STS 2009 1.G Owners Manual

At Least Once a Month
Tire Ination Check
Inspect the vehicle’s tires and make sure they are inated
to the correct pressures. Do not forget to check the spare
tire, if the vehicle has one. SeeInflation - Tire Pressure
on page 5-64. If the vehicle has a spare tire, check to
make sure it is stored securely. SeeChanging a Flat Tire
on page 5-104.
Tire Wear Inspection
Tire rotation is recommended if the vehicle has the same
size tires at all four wheel positions and may be required
for high mileage highway drivers prior to the Engine Oil
Life System service notication. Check the tires for wear
and, if necessary, rotate the tires. SeeTire Inspection
and Rotation on page 5-71.
At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-33.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in P (Park) or N (Neutral). If the
vehicle starts in any other position, contact
your dealer/retailer for service.
6-11

Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough
room around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake. SeeParking Brake
on page 2-33.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off and without applying the regular
brake, try to move the shift lever out of P (Park)
with normal effort. If the shift lever moves out
of P (Park), contact your dealer/retailer for service.
Parking Brake and Automatic
Transmission P (Park) Mechanism
Check
{CAUTION:
When you are doing this check, the vehicle could
begin to move. You or others could be injured and
property could be damaged. Make sure there is
room in front of the vehicle in case it begins to roll.
Be ready to apply the regular brake at once
should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing downhill.
Keeping your foot on the regular brake, set the parking
brake.
To check the parking brake’s holding ability: With the
engine running and transmission in N (Neutral),
slowly remove foot pressure from the regular brake
pedal. Do this until the vehicle is held by the parking
brake only.
6-12

To check the P (Park) mechanism’s holding ability:
With the engine running, shift to P (Park). Then
release the parking brake followed by the regular
brake.
Contact your dealer/retailer if service is required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
Tire Sealant and Compressor Kit
If the vehicle has a Tire Sealant and Compressor Kit,
check the sealant expiration date printed on the
instruction label of the kit at least once a year.
See your dealer/retailer for a replacement canister.
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.
Engine Cooling
System50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-27.
6-13

Usage Fluid/Lubricant
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).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Rear AxleSAE 75W-90 Synthetic Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Specication 9986115.
Usage Fluid/Lubricant
Front Axle
(All-Wheel
Drive)SAE 75W-90 Synthetic Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Specication 9986115.
Transfer Case
(All-Wheel
Drive)Manual Transmission Fluid
(GM Part No. U.S. 88861800,
in Canada 88861801).
Hood Latch
Assembly,
Secondary
Latch, Pivots,
Spring
Anchor, and
Release PawlLubriplate Lubricant Aerosol
(GM Part No. U.S. 12346293,
in Canada 992723) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Hood and
Door HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Weatherstrip
ConditioningWeatherstrip Lubricant
(GM Part No. U.S. 3634770,
in Canada 10953518) or
Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
6-14

Maintenance Replacement Parts
Replacement parts identied below by name, part number, or specication can be obtained from your dealer/retailer.
Part GM Part Number ACDelco Part Number
Engine Air Cleaner/Filter Element
3.6L and 4.6L Engines 25798271 A2944C
4.4L (V-Series) Engine 15813300 A3078C
Engine Oil Filter
3.6L Engine 25177917 PF2129
4.4L (V-Series) Engine 89017527
1PF261
4.6L Engine 89017342 PF61
Passenger Compartment Air Filter 88957450 CF13C
Spark Plugs
3.6L Engine 92220447 41-990
4.4L (V-Series) Engine 12592619 41-991
4.6L Engine 12571535 41-987
Wiper Blades
Driver Side – 22 in (56.5 cm) 88958361 —
Passenger Side – 21 in (53.0 cm) 88958359 —
1Notice: If the vehicle is an STS-V model, the engine uses a special oil lter. The use of any other engine
oil lter could lead to lter failure and result in severe engine damage. Damage caused by use of the
wrong engine oil lter would not be covered by the vehicle warranty.
6-15

Engine Drive Belt Routing
3.6L V6 Engine
4.4L V8 Engine
6-16

4.6L V8 Engine
6-17

Reporting Safety Defects to the
Canadian Government
If you live in Canada, and you believe that your
vehicle has a safety defect, notify Transport Canada
immediately, in addition to notifying General Motors of
Canada Limited. Call them at 1-800-333-0510 or write to:
Transport Canada
Road Safety Branch
2780 Sheffield Road
Ottawa, Ontario K1B 3V9
Reporting Safety Defects to
General Motors
In addition to notifying NHTSA (or Transport Canada)
in a situation like this, please notify General Motors.
Call 1-800-458-8006, or write:
Cadillac Customer Assistance Center
Cadillac Motor Car Division
P.O. Box 33169
Detroit, MI 48232-5169
In Canada, call 1-888-446-2000, or write:
Canadian Cadillac Customer Communication Centre,
CA1-163-005
General Motors of Canada Limited
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle suspension,
brakes, electrical, steering, body, etc.
Service Bulletins
Service Bulletins give additional technical service
information needed to knowledgeably service
General Motors cars and trucks. Each bulletin contains
instructions to assist in the diagnosis and service of
your vehicle.
Owner Information
Owner publications are written specically for owners
and intended to provide basic operational information
about the vehicle. The owner manual includes the
Maintenance Schedule for all models.
In-Portfolio: Includes a Portfolio, Owner Manual, and
Warranty Booklet.
RETAIL SELL PRICE: $35.00 (U.S.) plus processing fee
Without Portfolio: Owner Manual only.
RETAIL SELL PRICE: $25.00 (U.S.) plus processing fee
7-15

Current and Past Model Order Forms
Technical Service Bulletins and Manuals are available
for current and past model GM vehicles. To request
an order form, specify year and model name of
the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc.
on the World Wide Web at: helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and without
incurring obligation. Allow ample time for delivery.
Note to Canadian Customers: All listed prices are
quoted in U.S. funds. Canadian residents are to make
checks payable in U.S. funds.
Vehicle Data Recording and
Privacy
Your GM vehicle has a number of sophisticated
computers that record information about the vehicle’s
performance and how it is driven. For example,
your vehicle uses computer modules to monitor and
control engine and transmission performance, to monitor
the conditions for airbag deployment and deploy
airbags in a crash and, if so equipped, to provide
antilock braking to help the driver control the vehicle.
These modules may store data to help your
dealer/retailer technician service your vehicle. Some
modules may also store data about how you operate the
vehicle, such as rate of fuel consumption or average
speed. These modules may also retain the owner’s
personal preferences, such as radio pre-sets, seat
positions, and temperature settings.
7-16

A
Accessories and Modications............................ 5-3
Accessory Power Outlets.................................3-46
Adaptive Cruise Control...................................3-20
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-64
Additives, Fuel................................................. 5-7
Add-On Electrical Equipment...........................5-113
Air Cleaner/Filter, Engine.................................5-23
Air Conditioning..............................................3-48
Airbag
Passenger Status Indicator...........................3-59
Readiness Light..........................................3-58
Airbag System................................................1-51
Adding Equipment to Your
Airbag-Equipped Vehicle............................1-64
How Does an Airbag Restrain?......................1-57
Passenger Sensing System...........................1-59
Servicing Your Airbag-Equipped Vehicle..........1-64
What Makes an Airbag Inate?......................1-57
What Will You See After an Airbag
Inates?..................................................1-58
When Should an Airbag Inate?....................1-56
Where Are the Airbags?...............................1-53
All-Wheel Drive...............................................5-47
All-Wheel-Drive (AWD) System.........................4-12
Antenna, Backglass.......................................3-134
Antenna, XM™ Satellite Radio Antenna
System.....................................................3-134Antilock Brake System (ABS)............................. 4-4
Antilock Brake, System Warning Light................3-63
Appearance Care
Aluminum or Chrome-Plated Wheels.............5-110
Care of Safety Belts...................................5-108
Chemical Paint Spotting..............................5-112
Cleaning Exterior Lamps/Lenses..................5-109
Fabric/Carpet............................................5-106
Finish Care...............................................5-109
Finish Damage..........................................5-111
Instrument Panel, Vinyl, and Other
Plastic Surfaces
.....................................5-107
Interior Cleaning........................................5-105
Leather....................................................5-107
Sheet Metal Damage..................................5-111
Speaker Covers.........................................5-108
Tires........................................................5-111
Underbody Maintenance.............................5-111
Washing Your Vehicle.................................5-108
Weatherstrips............................................5-108
Windshield and Wiper Blades......................5-110
Wood Panels............................................5-107
Appointments, Scheduling Service.....................7-10
Ashtray.........................................................3-47
Audio System.................................................3-97
Audio Steering Wheel Controls....................3-131
Backglass Antenna.....................................3-134
Navigation/Radio System, see Navigation
Manual.................................................3-116
Radio Personalization.................................3-126
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