2006 CADILLAC STS fuel additives

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
Your Vehicle..............................................5-5
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..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-18
Engine Oil Life System..................................5-22
Engine Air Cleaner/Filter................................5-24
Automatic Transmission Fluid.........................5-26
Engine Coolant.............................................5-26
Coolant Surge Tank Pressure Cap..................5-30
Engine Overheating.......................................5-30
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
Bulb Replacement..........................................5-53
High Intensity Discharge (HID) Lighting............5-53
Halogen Bulbs..............................................5-53
Back-Up Lamps............................................5-54
Replacement Bulbs.......................................5-54
Windshield Replacement.................................5-55
Windshield Wiper Blade Replacement..............5-55
Tires..............................................................5-56
Tire Sidewall Labeling...................................5-58
Tire Terminology and Denitions.....................5-60
Run-Flat Tires (STS-V)..................................5-63
Ination - Tire Pressure.................................5-64
Tire Pressure Monitor System.........................5-66
Tire Inspection and Rotation...........................5-70
When It Is Time for New Tires.......................5-71
Section 5 Service and Appearance Care
5-1

If your vehicle has the 4.4L V8 engine (VIN Code D), use
premium unleaded gasoline with a posted octane rating
of 91 or higher. For best performance, use premium
unleaded gasoline with a posted octane rating of 93. In
an emergency, you can use regular unleaded gasoline
with an octane rating of 87 or higher. If 87 octane fuel is
used, do not perform any aggressive driving maneuvers
such as wide open throttle applications. You may also
hear audible spark knock during acceleration. Rell your
tank with premium fuel as soon as possible to avoid
damaging your engine. If you are using gasoline rated at
91 octane or higher and you hear heavy knocking, your
engine needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl (MMT).
General Motors recommends against the use of
gasolines containing MMT. SeeAdditives on page 5-6
for additional information.
California Fuel
If your vehicle is certied to meet California Emissions
Standards, it is designed to operate on fuels that meet
California specications. See the underhood emission
control label. If this fuel is not available in states adopting
California emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal specications, but
emission control system performance may be affected.
The malfunction indicator lamp may turn on and your
vehicle may fail a smog-check test. SeeMalfunction
Indicator Lamp on page 3-67. If this occurs, return to your
authorized GM dealer for diagnosis. If it is determined
that the condition is caused by the type of fuel used,
repairs may not be covered by your warranty.
Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent engine and fuel system deposits from forming,
allowing your emission control system to work properly. In
most cases, you should not have to add anything to your
fuel. However, some gasolines contain only the minimum
amount of additive required to meet U.S. Environmental
Protection Agency regulations.
5-6

To help keep fuel injectors and intake valves clean, or if
your vehicle experiences problems due to dirty injectors
or valves, look for gasoline that is advertised as TOP
TIER Detergent Gasoline. Also, your GM dealer has
additives that will help correct and prevent most
deposit-related problems.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines may be available
in your area. General Motors recommends that you use
these gasolines if they comply with the specications
described earlier. However, E85 (85% ethanol) and other
fuels containing more than 10% ethanol must not be used
in vehicles that were not designed for those fuels.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. General Motors
recommends against the use of such gasolines. Fuels
containing MMT can reduce the life of spark plugs
and the performance of the emission control system may
be affected. The malfunction indicator lamp may turn
on. If this occurs, return to your authorized GM dealer
for service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may 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.
5-7

A
Accessories and Modications............................ 5-3
Accessory Power Outlet(s)...............................3-46
Adaptive Cruise Control...................................3-19
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-63
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-104
Air Cleaner/Filter, Engine.................................5-24
Air Conditioning..............................................3-48
Airbag
Passenger Status Indicator...........................3-61
Readiness Light..........................................3-60
Airbag Sensing and Diagnostic Module (SDM)...... 7-8
Airbag System................................................1-49
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-63
How Does an Airbag Restrain?......................1-57
Passenger Sensing System...........................1-59
Servicing Your Airbag-Equipped Vehicle..........1-63
What Makes an Airbag Inate?......................1-57
What Will You See After an Airbag Inates?....1-57
When Should an Airbag Inate?....................1-55
Where Are the Airbags?...............................1-52
All-Wheel Drive...............................................5-50
All-Wheel-Drive (AWD) System.........................4-12
Antenna, Diversity Antenna System..................3-122Antenna, XM™ Satellite Radio
Antenna System........................................3-122
Anti-Lock Brake System (ABS)........................... 4-7
Anti-Lock Brake, System Warning Light..............3-65
Appearance Care
Aluminum or Chrome-Plated Wheels..............5-99
Care of Safety Belts....................................5-97
Chemical Paint Spotting..............................5-101
Cleaning Exterior Lamps/Lenses....................5-98
Cleaning the Inside of Your Vehicle................5-94
Fabric/Carpet..............................................5-96
Finish Care.................................................5-98
Finish Damage..........................................5-101
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-97
Leather......................................................5-96
Sheet Metal Damage..................................5-100
Speaker Covers..........................................5-97
Tires........................................................5-100
Underbody Maintenance.............................5-101
Vehicle Care/Appearance Materials...............5-102
Washing Your Vehicle...................................5-98
Weatherstrips..............................................5-97
Windshield and Wiper Blades........................5-99
Wood Panels..............................................5-97
Ashtray(s)......................................................3-47
Audio System(s).............................................3-94
Audio Steering Wheel Controls....................3-119
Care of Your CD Player..............................3-122
1

Engine
Air Cleaner/Filter.........................................5-24
Battery.......................................................5-44
Check and Service Engine Soon Light............3-67
Coolant......................................................5-26
Coolant Heater............................................2-27
Coolant Temperature Gage...........................3-67
Coolant Temperature Warning Light................3-66
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-39
Oil .............................................................5-18
Oil Life System...........................................5-22
Overheated Protection Operating Mode...........5-31
Overheating................................................5-30
Starting......................................................2-25
Entry Lighting.................................................3-39
Event Data Recorders (EDR)............................. 7-8
Extender, Safety Belt.......................................1-26
Exterior Lighting Battery Saver..........................3-38
F
Filter
Engine Air Cleaner......................................5-24
Finish Damage.............................................5-101
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass.................................................3-12
Flat Tire........................................................5-81
Flat Tire, Changing.........................................5-83
Flat Tire, Storing.............................................5-92
Fluid
Automatic Transmission................................5-26
Power Steering...........................................5-39
Windshield Washer......................................5-40
Fog Lamp Light..............................................3-71
Fog Lamps ....................................................3-37
Forward Collision Alert (FAC) System.................. 3-9
Front Axle......................................................5-52
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
Gage .........................................................3-72
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-105
Rear Underseat Fuse Block.........................5-110
Underhood Fuse Block...............................5-106
Windshield Wiper.......................................5-104
5