2003 GMC SIERRA flat tire

A. Push and Pull
B. Rotate Tire
7. Make sure the tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If the tire
moves, use the wheel wrench to tighten the cable.
Reinstall the spare tire lock (if equipped).
Secondary Latch System
Your vehicle has an underbody mounted tire hoist
assembly equipped with a secondary latch system.
It’s designed to stop the spare tire from suddenly falling
off your vehicle. For the secondary latch to work, the
spare must be installed with the valve stem pointing
down. See“Storing a Flat or Spare Tire, Jack and Tools”
earlier in this section.
{CAUTION:
Before beginning this procedure read all the
instructions. Failure to read and follow the
instructions could damage the hoist assembly
and you and others could get hurt. Read and
follow the instructions listed below.
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2003 - Sierra Denali

11. Lower the jack by turning the wheel wrench
counterclockwise. Keep lowering the jack until the
spare tire slides off the jack or is hanging by
the cable.
{CAUTION:
Someone standing too close during the
procedure could be injured by the jack. If the
spare tire does not slide off the jack
completely, make sure no one is behind you or
on either side of you as you pull the jack out
from the spare.
12. Disconnect the jack handle from the jack
and carefully remove the jack. Use one hand
to push against the spare whilefirmly pulling the
jack out from under the spare tire with the
other hand.
If the spare tire is hanging from the cable, insert the
hoist handle, extension and wheel wrench into
the hoist shaft hole in the bumper and turn
the wheel wrench counterclockwise to lower the
spare the rest of the way.13. Tilt the retainer at the
end of the cable and
pull it through the
wheel opening. Pull the
tire out from under
the vehicle.
14. If the cable is hanging under the vehicle, turn the
wheel wrench clockwise to raise the cable back up.
Have the hoist assembly inspected as soon as you can.
You will not be able to store a spare orflat tire using
the hoist assembly until it has been replaced.
To continue changing theflat tire, see“Removing the
Flat Tire and Installing the Spare Tire”earlier in
this section.
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2003 - Sierra Denali

Spare Tire
Your vehicle, when new, had a fully inflated spare tire.
A spare tire may lose air over time, so check its
inflation pressure regularly. SeeInflation -- Tire Pressure
on page 5-57andLoading Your Vehicle on page 4-47
for information regarding proper tire inflation and loading
your vehicle. For instruction on how to remove, install
or store a spare tire, seeChanging a Flat Tire on
page 5-65.
After installing the spare tire on your vehicle, you should
stop as soon as possible and make sure the spare is
correctly inflated. Have the damaged orflat road
tire repaired or replaced as soon as you can and
installed back onto your vehicle. This way, a spare tire
will be available in case you need it again.
If your vehicle has a spare tire that does not match your
vehicle’s original road tires and wheels in size and
type, do not include the spare in the tire rotation.
Appearance Care
Remember, cleaning products can be hazardous. Some
are toxic. Others can burst intoflames if you strike a
match or get them on a hot part of the vehicle. Some are
dangerous if you breathe their fumes in a closed
space. When you use anything from a container to cleanyour vehicle, be sure to follow the manufacturer’s
warnings and instructions. And always open your doors
or windows when you’re cleaning the inside.
Neveruse these to clean your vehicle:
•Gasoline
•Benzene
•Naphtha
•Carbon Tetrachloride
•Acetone
•Paint Thinner
•Turpentine
•Lacquer Thinner
•Nail Polish Remover
They can all be hazardous–some more than
others–and they can all damage your vehicle, too.
Don’t use any of these unless this manual says you can.
In many uses, these will damage your vehicle:
•Alcohol
•Laundry Soap
•Bleach
•Reducing Agents
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2003 - Sierra Denali

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.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield. Also see
Cleaning the Outside of Your Vehicle on page 5-85.
Spare Tire Check
At least twice a year, after the monthly ination check of
the spare tire determines that the spare is inated to
the correct tire ination pressure, make sure that
the spare tire is stored securely. Push, pull, and then try
to rotate or turn the tire. If it moves, use the wheel
wrench/ratchet to tighten the cable. SeeChanging a Flat
Tire on page 5-65.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. SeePart D: Recommended Fluids and
Lubricants on page 6-15.
Automatic Transmission Check
Check the transmissionuid level; add if needed. See
Automatic Transmission Fluid on page 5-20.Auid loss
may indicate a problem. Check the system and repair
if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specied in Part D.
Body Lubrication Service
Lubricate all body door hinges, hood latch assembly,
secondary latch, pivots, spring anchor, release
pawl, tailgate hinge, tailgate linkage, tailgate handle
pivot points, latch bolt, fuel door hinge, locks and folding
seat hardware. Part D tells you what to use. More
frequent lubrication may be required when exposed to a
corrosive environment.
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2003 - Sierra Denali

GM Mobility Program for Persons
with Disabilities
This program, available to
qualied applicants, can
reimburse you up to
$1,000 toward aftermarket
driver or passenger
adaptive equipment you
may require for your
vehicle (hand controls,
wheelchair/scooter
lifts, etc.).
This program can also provide you with free resource
information, such as area driver assessment centers and
mobility equipment installers. The program is available
for a limited period of time from the date of vehicle
purchase/lease. See your dealer for more details or call
the GM Mobility Assistance Center at 1-800-323-9935.
Text telephone (TTY) users, call 1-800-833-9935.
GM of Canada also has a Mobility Program. Call
1-800-GM-DRIVE (463-7483) for details. All TTY users
call 1-800-263-3830.
Roadside Assistance Program
GMC’s Roadside Assistance Provides stranded owners
with over-the-phone roadside repairs, location of the
nearest GMC dealer or the following special services:
Flat Tire Change:Installation of spare tire will be
covered at no charge (customer is responsible for repair
or replacement of tire).
Fuel Delivery:Delivery of enough fuel for the customer
to get to the nearest service station (up to $5.00)
will be covered.
Jump Start:No-start situations which require a battery
jump start will be covered at no charge.
Lock Out:Replacement keys or locksmith service will be
covered at no charge if you are unable to gain entry
into your vehicle. Delivery of the replacement key will be
covered within 10 miles (16 km).
Emergency Towing Service:Towing to the nearest GMC
dealer for warranty related disablements will be
covered.
Trip Routing:Custom-made, computerized highlighted
maps using the most direct or scenic route are provided
free of charge. Maps include points of interest and a
list of GMC dealers along the route. Also included is a
list of hotels along the route that are discounted
through affiliation with“Quest International.”Trip Routing
is available through Roadside Assistance by calling
7-5
2003 - Sierra Denali

F
Filter
Engine Air Cleaner......................................5-18
Finding a PTY Station (RDS and XM™) .............3-61
Finding a Station............................................3-59
Finish Care....................................................5-85
Finish Damage...............................................5-87
Fixed Mast Antenna........................................3-78
Flash-To-Pass Feature....................................... 3-7
Flat Tire........................................................5-64
Flat Tire, Changing.........................................5-65
Fluid
Automatic Transmission................................5-20
Power Steering...........................................5-34
Windshield Washer......................................5-35
FM Stereo.....................................................3-76
Fog Lamps ....................................................3-14
Folding the Rear Seat....................................... 1-6
Following Distance..........................................4-58
Footnotes........................................................ 6-5
Front Axle......................................................5-47
Front Reading Lamps
......................................3-15
Fuel
............................................................... 5-4
Additives
...................................................... 5-6
California Fuel
.............................................. 5-5
Filling a Portable Fuel Container
..................... 5-9
Filling Your Tank
........................................... 5-7
Fuels in Foreign Countries
.............................. 5-6
Gage
.........................................................3-41Fuel (cont.)
Gasoline Octane........................................... 5-4
Gasoline Specifications.................................. 5-5
Low Warning Light.......................................3-41
System Inspection.......................................6-14
Fuel Information Button....................................3-44
FUEL LEVEL LOW.........................................3-54
Fuses
Fuses and Circuit Breakers...........................5-91
Windshield Wiper.........................................5-91
G
Gage
Engine Coolant Temperature.........................3-36
Fuel..........................................................3-41
Oil Pressure...............................................3-40
Speedometer..............................................3-26
Tachometer.................................................3-26
Transmission Temperature.............................3-36
Voltmeter Gage...........................................3-33
Garage Door Opener.......................................2-35
Gasoline
Octane........................................................ 5-4
Specifications............................................... 5-5
Gate Operator and Canadian Programming........2-37
Getting Familiar with Off-Road Driving................4-20
Glove Box.....................................................2-39
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
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2003 - Sierra Denali

Power
Accessory Outlets........................................3-16
Door Locks.................................................. 2-7
Electrical System.........................................5-91
Lumbar Controls........................................... 1-3
Seat............................................................ 1-2
Steering Fluid.............................................5-34
Windows....................................................2-12
Power Steering...............................................4-10
Programmable Automatic Door Locks.................. 2-7
Programming the HomeLink
®Transmitter...........2-35
Puddle Lamps................................................3-13
Q
QUADRASTEER™..........................................4-12
Questions and Answers About Safety Belts.........1-11
R
Radio Data System (RDS)...............................3-57
Radio Messages.............................................3-63
Radios..........................................................3-56
Care of Your Cassette Tape Player................3-77
Care of Your CD Player...............................3-78
Care of Your CDs ........................................3-78
CD Changer...............................................3-73
Navigation/Radio System..............................3-70Radios (cont.)
Radio with Cassette and CD.........................3-57
Rear Seat Audio..........................................3-71
Setting the Time..........................................3-57
Theft-Deterrent............................................3-75
Understanding Reception..............................3-76
RDS Messages..............................................3-62
Rear Axle......................................................5-46
Locking......................................................4-10
Rear Doors...................................................... 2-9
Rear Safety Belt Comfort Guides......................1-26
Rear Seat Audio Controls.................................3-71
Rear Seat Audio (RSA)....................................3-71
Rear Seat Operation......................................... 1-6
Rear Seat Outside Passenger Positions.............1-23
Rear Seat Passengers, Safety Belts..................1-23
Rear Seat Top Strap Anchors...........................1-41
Rear Window Defogger....................................3-23
Rearview Mirror, Automatic Dimming with OnStar
®,
Compass and Temperature Display..................2-28
Reclining Seatbacks.......................................... 1-4
Recreational Vehicle Towing.............................4-47
REDUCED ENGINE POWER...........................3-52
Remote Alarm.................................................. 2-4
Remote Keyless Entry System............................ 2-3
Remote Keyless Entry System, Operation
............ 2-4
Removing the Flat Tire and Installing the
Spare Tire
..................................................5-68
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2003 - Sierra Denali

Seats (cont.)
Rear Seat Operation...................................... 1-6
Reclining Seatbacks...................................... 1-4
Secondary Latch System.................................5-78
Securing a Child Restraint
Center Rear Seat Position............................1-47
Designed for the LATCH System...................1-45
Rear Outside Seat Position...........................1-45
Right Front Seat Position..............................1-49
Select Button.................................................3-51
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
Doing Your Own Work................................... 5-3
Engine Soon Light.......................................3-37
Publications Ordering Information..................... 7-9
SERVICE 4 WHEEL STEER.............................3-55
SERVICE 4WD ...............................................3-54
SERVICE AIR SUSPENSION...........................3-54
SERVICE AIRBAG ..........................................3-53
SERVICE BRAKE BOOSTER...........................3-53
SERVICE BRAKE SYSTEM.............................3-53
Service Bulletins.............................................7-10
Service Manuals............................................... 7-9
Setting Preset PTYs (RDS Only).......................3-62
Setting Preset Stations....................................3-59
Setting the Time.............................................3-57
Setting the Tone (Bass/Treble)..........................3-60Sheet Metal Damage.......................................5-87
Shifting Into Park (P).......................................2-23
Shifting Out of Park (P)...................................2-25
Skidding........................................................4-17
Some Other Rainy Weather Tips.......................4-34
Spare Tire.....................................................5-82
Spare Tire Check............................................6-11
Specifications, Capacities.................................5-99
Speedometer..................................................3-26
Stalling on an Incline.......................................4-28
Starter Switch Check.......................................6-12
Starting Your Engine.......................................2-17
Steering........................................................4-10
Steering and Suspension Inspection..................6-14
Steering in Emergencies
..................................4-11
Steering Tips
..................................................4-10
Steering Wheel Controls, Audio
.........................3-76
Storage Areas
Center Console Storage Area
........................2-39
Cupholder(s)
...............................................2-39
Glove Box
..................................................2-39
Storing a Flat or Spare Tire, Jack
and Tools
...................................................5-75
Stuck in Sand, Mud, Ice or Snow
......................4-44
Sun Visors
.....................................................2-13
Supplemental Brake Assist System
...................... 4-8
Swing-Out Windows
........................................2-12
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2003 - Sierra Denali