2009 CADILLAC CTS fuel pressure

Ination - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right. It is
not. If your tires do not have enough air
(under-ination), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-ination),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA vehicle specic Tire and Loading Information
label is attached to your vehicle. This label lists your
vehicle’s original equipment tires and shows the
correct ination pressures for your tires when they
are cold. The recommended cold tire ination
pressure, shown on the label, is the minimum
amount of air pressure needed to support your
vehicle’s maximum load carrying capacity.
For additional information regarding how much
weight your vehicle can carry, and an example of
the tire and loading information label, seeLoading
the Vehicle on page 4-20. How you load your
vehicle affects vehicle handling and ride comfort.
Never load your vehicle with more weight than it
was designed to carry.
When to Check
Check your tires once a month or more. Do not
forget to check the compact spare tire, if your
vehicle has one. The compact spare should be at
60 psi (420 kPa). For additional information
regarding the compact spare tire, seeCompact
Spare Tire on page 5-105.
5-69

See the example following. When you end this
high-speed driving, return the tires to the cold tire
ination pressure shown on the Tire and Loading
Information label. SeeLoading the Vehicle on page 4-20
andInflation - Tire Pressure on page 5-69.
Example:
You will nd the maximum load and ination pressure
molded on the tire’s sidewall, in small letters, near
the rim ange. It will read something like this: Maximum
load 690 kg (1521 lbs) 300 kPa (44 psi) Max. Press.
For this example, you would set the ination pressure for
high-speed driving at 44 psi (300 kPa).
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses radio
and sensor technology to check tire pressure levels.
The TPMS sensors monitor the air pressure in
your vehicle’s tires and transmit tire pressure readings
to a receiver located in the vehicle.Each tire, including the spare (if provided), should be
checked monthly when cold and inated to the ination
pressure recommended by the vehicle manufacturer
on the vehicle placard or tire ination pressure label.
(If your vehicle has tires of a different size than the
size indicated on the vehicle placard or tire ination
pressure label, you should determine the proper
tire ination pressure for those tires.)
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system (TPMS)
that illuminates a low tire pressure telltale when one
or more of your tires is signicantly under-inated.
Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires as soon
as possible, and inate them to the proper pressure.
Driving on a signicantly under-inated tire causes the
tire to overheat and can lead to tire failure. Under-ination
also reduces fuel efficiency and tire tread life, and may
affect the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-ination has
not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
5-71

At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by the vehicle
warranty.
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-18.
Coolant Level Check
Check the engine coolant level and, on CTS-V models,
check the intercooler coolant level. Add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-32.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer uid reservoir and add the proper uid if
necessary.
At Least Once a Month
Tire Inspection and Ination Check
Inspect the vehicle’s tires for wear and make
sure they are inated to the correct pressures.
SeeInflation - Tire Pressure on page 5-69.
6-11

Engine
Air Cleaner/Filter.........................................5-25
Check and Service Engine Soon Lamp...........3-43
Coolant......................................................5-32
Coolant Heater............................................2-35
Coolant Temperature Gage...........................3-42
Coolant Temperature Warning Light................3-41
Cover........................................................5-23
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-50
Oil .............................................................5-18
Oil Life System...........................................5-21
Oil Pressure Gage.......................................3-47
Overheated Protection Operating Mode...........5-39
Overheating................................................5-37
Speed Limiter.............................................3-34
Starting......................................................2-33
Entry Lighting.................................................3-20
Event Data Recorders.....................................7-17
Extender, Safety Belt.......................................1-33
Exterior Lighting Battery Saver..........................3-20
F
Filter
Engine Air Cleaner......................................5-25
Finish Damage.............................................5-113
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-85
Flat Tire, Changing.........................................5-96
Flat Tire, Storing...........................................5-104
Fluid
Automatic Transmission................................5-29
Power Steering...........................................5-40
Windshield Washer......................................5-41
Fog Lamp
Fog ...........................................................3-19
Fog Lamp Light..............................................3-48
Folding Rear Seat...........................................1-13
Fuel............................................................... 5-5
Additives...................................................... 5-7
California Fuel.............................................. 5-7
Filling a Portable Fuel Container....................5-11
Filling the Tank............................................. 5-8
Fuels in Foreign Countries.............................. 5-8
Gage .........................................................3-49
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-115
Rear Compartment Fuse Block..........5-122, 5-124
Underhood Fuse Block......................5-115, 5-119
Windshield Wiper.......................................5-115
5

G
Gage
Boost.........................................................3-50
Engine Coolant Temperature.........................3-42
Engine Oil Pressure.....................................3-47
Fuel..........................................................3-49
Speedometer..............................................3-33
Tachometer.................................................3-34
Garage Door Opener.......................................2-60
Gasoline
Octane........................................................ 5-6
Specications............................................... 5-6
Glove Box.....................................................2-64
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-2
Headlamp
Aiming .......................................................5-53
Headlamps....................................................3-17
Adaptive Forward Lighting System.................3-19
Bulb Replacement.......................................5-57Headlamps (cont.)
Daytime Running Lamp................................3-18
Flash-to-Pass............................................... 3-9
Front Turn Signal and Fog Lamps..................5-58
Halogen Bulbs............................................5-57
High Intensity Discharge (HID) Lighting...........5-57
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-17
Washer......................................................3-13
Wiper Activated...........................................3-17
Heated Seats................................................... 1-7
Heater...........................................................3-24
Engine Coolant...........................................2-35
Highbeam On Light.........................................3-49
High-Speed Operation, Tires.............................5-70
Highway Hypnosis...........................................4-15
Hill and Mountain Roads..................................4-16
Hood
Checking Things Under................................5-12
Release.....................................................5-12
Horn ............................................................... 3-6
How to Wear Safety Belts Properly...................1-19
Hydraulic Clutch.............................................5-30
6

Light (cont.)
StabiliTrak®/Traction Control System (TCS)
Warning Light..........................................3-41
Tire Pressure..............................................3-42
Up-Shift.....................................................3-38
Lighting
Entry.........................................................3-20
Parade Dimming..........................................3-20
Lights............................................................3-17
Flash-to-Pass............................................... 3-9
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-17
Limited-Slip Rear Axle....................................... 4-9
Loading Your Vehicle.......................................4-20
Lockout Protection..........................................2-19
Locks
Central Door Unlocking System.....................2-16
Delayed Locking..........................................2-17
Door ..........................................................2-16
Lockout Protection.......................................2-19
Power Door ................................................2-17
Programmable Automatic Door Locks.............2-17
Rear Door Security Locks.............................2-18
Loss of Control...............................................4-11
Lower Anchors and Tethers for Children.............1-45
Lumbar
Power and Side Bolsters................................ 1-6
Power Controls............................................. 1-6M
Magnetic Ride Control....................................... 4-8
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill.........................................6-11
At Least Once a Month................................6-11
At Least Once a Year..................................6-12
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-8
Maintenance Record....................................6-18
Maintenance Replacement Parts....................6-16
Maintenance Requirements............................. 6-2
Owner Checks and Services.........................6-10
Recommended Fluids and Lubricants.............6-14
Scheduled Maintenance................................. 6-4
Using.......................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Lamp...............................3-43
Manual Seats................................................... 1-4
Manual Transmission
Fluid..........................................................5-29
Operation...................................................2-40
Memory Seat, Mirrors, Steering Wheel Controls.... 1-8
Message
DIC Warnings and Messages........................3-58
8