2004 GMC YUKON fuel pressure

Ination - Tire Pressure
The tire and loading information label, shows the correct
ination pressures for your tires when they’re cold.
“Cold” means your vehicle has been sitting for at least
three hours or driven no more than 1 mile (1.6 km). See
Loading Your Vehicle on page 4-56, for the location
of your vehicle’s tire and loading information label.
Notice:Don’t let anyone tell you that underination
or overination is all right. It’s not. If your tires
don’t have enough air (underination), you can get
the following:
Too much exing
Too much heat
Tire overloading
Bad wear
Bad handling
Bad fuel economy
If your tires have too much air (overination), you
can get the following:
Unusual wear
Bad handling
Rough ride
Needless damage from road hazards
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare tire.
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can’t tell if your tires are properly inated
simply by looking at them. Radial tires may look
properly inated even when they’re underinated. Check
the tire’s ination pressure when the tires are cold.
cold means your vehicle has been sitting for at least
three hours or driven no more than 1 mile (1.6 km).
remove the valve cap from the tire valve stem. Press the
tire gage rmly onto the valve to get a pressure
measurement. If the cold tire ination pressure matches
the recommended pressure on the tire and loading
information label, no further adjustment is necessary. If
the pressure is low, add air until you reach the
recommended amount.
If you overll the tire, release air by pushing on the
metal stem in the center of the tire valve. Recheck the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
5-72

Tire Pressure Monitor System
The Tire Pressure Monitor (TPM) system uses radio
and sensor technology to check tire pressure levels. If
your vehicle has this feature, sensors are mounted
on each tire and wheel assembly, except the spare tire.
The TPM sensors transmit tire pressure readings to
a receiver located in the vehicle.
When a low tire pressure condition is detected, the TPM
system will display the CHECK TIRE PRESSURE
warning message on the Driver Information Center
(DIC); and at the same time illuminate the low tire
pressure warning symbol. For additional information and
details about the DIC operation and displays see DIC
Operation and Displays on page 3-58andDIC Warnings
and Messages on page 3-70.
When the tire pressure
monitoring system warning
light is lit, one or more
of your tires is signicantly
under-inated.
You should stop and check your tires as soon as
possible, and inate them to the proper pressure as
indicated on the vehicle’s tire information placard.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. Each tire, including the spare, should be
checked monthly when cold and set to the
recommended ination pressure as specied in the
vehicle placard and owner’s manual.
The Certication/Tire label or the Tire and Loading
Information label (tire information placard) shows the
size of your vehicle’s original tires and the correct
ination pressure for your vehicle’s tires when they are
cold. SeeInation - Tire Pressure on page 5-72. For
the location of the tire and loading information label, see
Loading Your Vehicle on page 4-56.
Your vehicle’s TPM system can alert you about a low
tire pressure condition but it does not replace normal tire
maintenance. SeeTire Inspection and Rotation on
page 5-76andTires on page 5-63.
Notice:Do not use a tire sealant if your vehicle is
equipped with Tire Pressure Monitors. The liquid
sealant can damage the tire pressure monitor
sensors.
5-73

(c)Visually inspect hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
ttings and clamps; replace with genuine GM 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)Visually inspect wiper blades for wear or cracking.
Replace blade inserts that appear worn or damaged
or that streak or miss areas of the windshield.
(e)Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
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 look for any opened or broken air bag
coverings, and have them repaired or replaced. (The air
bag system does not need regular maintenance.)
(f)Lubricate all key lock cylinders, hood latch assembly,
secondary latch, pivots, spring anchor, release pawl, rear
compartment hinges, outer liftgate handle pivot points,
rear door detent link, roller mechanism, liftgate handle
pivot points, latch bolt, fuel door hinge, cargo door hinge,
locks and folding seat hardware. 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)Add uid as needed. A uid loss could indicate a
problem; repair as needed. Check vent hose at transfer
case for kinks and proper installation.
(h)Change automatic transmission uid and lter 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 found in taxi, police or delivery
service.
(i)Drain, ush and rell cooling system. See Engine
Coolant on page 5-26for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and ller neck.
Pressure test the cooling system and pressure cap.
(j)A uid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the uid level checked. Add uid if needed.
(k)Inspect system. Check all fuel and vapor lines and
hoses for proper hook-up, routing and condition.
Check that the purge valve works properly (if equipped).
Replace as needed.
6-8

Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-12.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-16for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. SeeEngine
Coolant on page 5-26for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank and add the proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inated to the correct pressures. Do not forget to check
your spare tire. SeeTires on page 5-63for further
details. Check to make sure the spare tire is stored
securely. Push, pull and then try to rotate or turn
the spare tire. If it moves, tighten it. SeeChanging a
Flat Tire on page 5-84.
6-9

Bulb Replacement (cont.)
Replacement Bulbs......................................5-61
Roof Marker Lamps.....................................5-58
Side Identication Marker Lamps...................5-57
Taillamps....................................................5-60
Buying New Tires...........................................5-78
C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specications..........................5-122
Car Washes for QUADRASTEER™ Equipped
Vehicles.....................................................4-18
Carbon Monoxide...................4-46, 4-63, 2-13, 2-42
Care of
Safety Belts..............................................5-106
Your Cassette Tape Player..........................3-137
Your CD and DVD Player...........................3-139
Your CDs and DVDs..................................3-138
Cargo Cover..................................................2-62
Cargo Tie Downs............................................2-62
Cassette Tape Messages...............................3-104
CD Adapter Kits............................................3-104
CD Messages.............................3-92, 3-107, 3-122
Center Console Storage Area...........................2-60
Center Instrument Panel Fuse Block................5-116Center Passenger Position, Safety Belts.............1-37
Chains, Tires..................................................5-82
CHANGE ENGINE OIL....................................3-71
Check
Engine Light...............................................3-51
Check Engine Light.........................................3-51
CHECK OIL LEVEL.........................................3-71
CHECK TIRE PRESSURE...............................3-71
CHECK WASHER FLUID.................................3-71
Checking Brake Fluid......................................5-42
Checking Coolant............................................5-27
Checking Engine Oil........................................5-16
Checking Things Under the Hood......................5-10
Checking Your Restraint Systems......................1-87
Chemical Paint Spotting.................................5-110
Child Restraints
Child Restraint Systems...............................1-51
Infants and Young Children...........................1-48
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-60
Older Children.............................................1-45
Securing a Child Restraint Designed for the
LATCH System........................................1-62
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-65
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-62
Securing a Child Restraint in the Center Front
Seat Position...........................................1-67
3

Folding the Seatback.......................................1-16
Folding the Seatbacks.......................1-9, 1-11, 1-21
Following Distance..........................................4-72
Four-Wheel Drive....................................2-28, 5-53
Four-Wheel-Drive Light....................................3-56
Front Axle......................................................5-54
Front Axle Locking Feature...............................2-29
Front Reading Lamps......................................3-19
Front Storage Area.........................................2-60
Frontal Air Bags.............................................1-77
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
E-85 (85% Ethanol)....................................... 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-8
Gage.........................................................3-57
Gasoline Octane........................................... 5-4
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-57
Fuel Information Button....................................3-61
FUEL LEVEL LOW.........................................3-72
Fuses
Fuses and Circuit Breakers.........................5-113
Windshield Wiper.......................................5-113G
Gage
Engine Coolant Temperature.........................3-49
Fuel..........................................................3-57
Oil Pressure...............................................3-55
Speedometer..............................................3-42
Tachometer.................................................3-42
Transmission Temperature.............................3-49
Voltmeter Gage...........................................3-45
Garage Door Opener.......................................2-55
Gasoline
Octane........................................................ 5-4
Specications............................................... 5-5
Gate Operator and Canadian Programming........2-58
Getting Familiar with Off-Road Driving................4-26
Glove Box.....................................................2-60
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-7
Headlamp High/Low-Beam Changer.................... 3-9
7

L
Lamps
Exterior......................................................3-15
Interior.......................................................3-19
Lamps On Reminder.......................................3-17
Lap Belt........................................................1-38
Lap-Shoulder Belt...........................................1-29
LATCH System
Child Restraints...........................................1-60
Securing a Child Restraint Designed for the
LATCH System........................................1-62
Leaving Your Vehicle With the Engine
Running.....................................................2-40
LEFT REAR DOOR AJAR................................3-72
Level Control..................................................4-61
Liftgate..........................................................2-13
Liftgate Glass and Liftgate................................2-14
Light
Air Bag Readiness.......................................3-43
Anti-Lock Brake System Warning...................3-47
Battery Warning..........................................3-45
Brake System Warning.................................3-46
Cruise Control.............................................3-56
Four-Wheel-Drive.........................................3-56
Low Fuel Warning.......................................3-57
Malfunction Indicator....................................3-51Light (cont.)
Passenger Air Bag Status Indicator................3-43
Safety Belt Reminder...................................3-42
Tire Pressure..............................................3-51
Tow/Haul Mode...........................................3-56
Traction Off................................................3-48
Lighted Visor Vanity Mirror...............................2-17
Listening to a DVD..............................3-107, 3-122
Loading Your Vehicle.......................................4-56
Loading Your Vehicle for Off-Road Driving..........4-24
Locking Rear Axle...........................................4-11
Lockout Protection..........................................2-13
Lock-Out Switch.............................................2-17
Locks
Delayed Locking..........................................2-10
Door........................................................... 2-8
Lockout Protection.......................................2-13
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-21
LOW COOLANT LEVEL..................................3-72
Low Fuel Warning Light...................................3-57
Luggage Carrier..............................................2-60
Lumbar
Power Controls............................................. 1-5
9

Side Impact Air Bags.......................................1-78
Skidding........................................................4-21
Some Other Rainy Weather Tips.......................4-40
Spare Tire....................................................5-102
Special Fabric Cleaning Problems....................5-105
Specications, Capacities...............................5-122
Speedometer..................................................3-42
Split Bench Seat (50/50)..................................1-11
Split Bench Seat (60/40).................................... 1-8
Stabilitrak
®, All-Wheel Drive..............................2-33
Stabilitrak®System.........................................4-11
STABILITY SYS ACTIVE..................................3-75
STABILITY SYS DISABLED..............................3-75
Stalling on an Incline.......................................4-34
Starting Your Engine.......................................2-22
Steering........................................................4-14
Steering in Emergencies..................................4-15
Steering Tips..................................................4-14
Steering Wheel Controls, Audio.......................3-136
Step-Bumper Pad...........................................4-79
Stereo RCA Jacks.........................................3-130
Storage Areas
Center Console Storage Area........................2-60
Convenience Net.........................................2-62
Cupholder(s)...............................................2-60
Front Storage Area......................................2-60
Glove Box..................................................2-60
Luggage Carrier..........................................2-60Storage Areas (cont.)
Rear Storage Area.......................................2-62
Storing a Flat or Spare Tire, Jack and Tools.......5-95
Stuck in Sand, Mud, Ice or Snow......................4-50
Sun Visors.....................................................2-17
Sunroof.........................................................2-63
T
Tachometer....................................................3-42
Taillamps.......................................................5-60
Temperature and Compass Display....................2-44
Temperature Display........................................2-47
Testing the Alarm............................................2-19
Theft-Deterrent, Radio....................................3-135
Theft-Deterrent Systems...................................2-18
Content Theft-Deterrent................................2-18
Passlock
®...................................................2-20
Third Row......................................................1-65
Throttle, Adjustable..........................................2-23
TIGHTEN FUEL CAP......................................3-76
Tilt Wheel........................................................ 3-7
Tilting the 50/50 Split Bench Seat.....................1-12
Tilting the Bench Seat.....................................1-17
Tire
Pressure Light.............................................3-51
Tire Sidewall Labeling......................................5-63
15