2003 GMC SIERRA fuel

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.
6-11
2003 - Sierra Denali

Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall).You should let your dealer’s
service department do these jobs. Make sure any
necessary repairs are completed at once.
Proper procedures to perform these services may be
found in a service manual. SeeService Publications
Ordering Information on page 7-9.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chang, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in theoor pan or could let
exhaust fumes into the vehicle. SeeEngine Exhaust
on page 2-26.
Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
ttings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
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2003 - Sierra Denali

Usage Fluid/Lubricant
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Floor Shift
LinkageLubriplate Lubricant Aerosol (GM
Part No. U.S. 12346293, in Canada
992723, or equivalent) or lubricant
meeting requirements of NLGI #2
Category LB or GC-LB.
Chassis
LubricationChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front AxleSAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455) or
equivalent meeting GM Specication
9986115.
Rear Axle
(Steerable)Synthetic Axle Lubricant; use only
GM Part No. 12378557 (in Canada
88901362). Do not add friction
modier.
Transfer CaseDEXRON
®-III Automatic
Transmission Fluid.
Rear Driveline
Center SplineChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Usage Fluid/Lubricant
Front Axle
Propshaft
SplineSpline Lubricant, Special Lubricant
(GM Part No. U.S. 12345879, in
Canada 10953511) or lubricant
meeting requirements of GM
9985830.
Hood HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Body Door
Hinge Pins,
Tailgate Hinge
and Linkage,
Folding Seats
and Fuel Door
HingeMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Tailgate Handle
Pivot Points,
Hinges, Latch
Bolt and
LinkageMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Weatherstrip
ConditioningDielectric Silicone Grease (GM Part
No. U.S. 12345579, in Canada
10953014, or equivalent).
Weatherstrip
SqueaksSynthetic Grease with Teon,
Superlube (GM Part No. U.S.
12371287, in Canada 10953437, or
equivalent).
6-16
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

Courtesy Transportation
GMC has always exemplied quality and value in its
offering of motor vehicles. To enhance your ownership
experience, we and our participating dealers are
proud to offer Courtesy Transportation, a customer
support program for new vehicles.
The Courtesy Transportation program is offered to retail
purchase/lease customers in conjunction with the
Bumper-to-Bumper coverage provided by the New
Vehicle Limited Warranty. Several transportation options
are available when warranty repairs are required.
This will reduce your inconvenience during warranty
repairs.
Plan Ahead When Possible
When your vehicle requires warranty service, you
should contact your dealer and request an appointment.
By scheduling a service appointment and advising
your service consultant of your transportation needs,
your dealer can help minimize your inconvenience.
If your vehicle cannot be scheduled into the service
department immediately, keep driving it until it can be
scheduled for service, unless, of course, the problem is
safety-related. If it is, please call your dealership, let
them know this, and ask for instructions.If the dealer requests that you simply drop the vehicle
off for service, you are urged to do so as early in
the work day as possible to allow for the same day
repair.
Transportation Options
Warranty service can generally be completed while you
wait. However, if you are unable to wait, GMC helps
minimize your inconvenience by providing several
transportation options. Depending on the circumstances,
your dealer can offer you one of the following:
Shuttle Service
Participating dealers can provide you with shuttle
service to get you to your destination with minimal
interruption of your daily schedule. This includes a one
way shuttle ride to a destination up to 10 miles from
the dealership.
Public Transportation or Fuel
Reimbursement
If your vehicle requires overnight warranty repairs,
reimbursement up to $30 per day (ve days maximum)
may be available for the use of public transportation
such as taxi or bus. In addition, should you arrange
transportation through a friend or relative,
reimbursement for reasonable fuel expenses up to
$10 per day (ve day maximum) may be available.
Claim amounts should reect actual costs and be
supported by original receipts.
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2003 - Sierra Denali

Courtesy Rental Vehicle
When your vehicle is unavailable due to overnight
warranty repairs, your dealer may arrange to provide
you with a courtesy rental vehicle or reimburse you for a
rental vehicle you obtained, at an actual cost, up to a
maximum of $30.00 per day supported by receipts. This
requires that you sign and complete a rental agreement
and meet state, local and rental vehicle provider
requirements. Requirements vary and may include
minimum age requirements, insurance coverage, credit
card, etc. You are responsible for fuel usage charges
and may also be responsible for taxes, levies,
usage fees, excessive mileage or rental usage beyond
the completion of the repair.
Generally it is not possible to provide a like-vehicle as a
courtesy rental.
Additional Program Information
Courtesy Transportation is available during the
Bumper-to-Bumper warranty coverage period, but itis
notpart of the New Vehicle Limited Warranty. A
separate booklet entitledWarranty and Owner
Assistance Informationfurnished with each new vehicle
provides detailed warranty coverage information.
Courtesy Transportation is available only at participating
dealers and all program options, such as shuttle
service, may not be available at every dealer.Please contact your dealer for specic information about
availability. All Courtesy Transportation arrangements
will be administered by appropriate dealer personnel.
Canadian Vehicles:For warranty repairs during
the Complete Vehicle Coverage period of the General
Motors of Canada New Vehicle Limited Warranty,
alternative transportation may be available under the
Courtesy Transportation Program. Please consult
your dealer for details.
General Motors reserves the right to unilaterally modify,
change or discontinue Courtesy Transportation at
any time and to resolve all questions of claim eligibility
pursuant to the terms and conditions described
herein at its sole discretion.
Reporting Safety Defects
Reporting Safety Defects to the
United States Government
If you believe that your vehicle has a defect which could
cause a crash or could cause injury or death, you
should immediately inform the National Highway Traffic
Safety Administration (NHTSA), in addition to notifying
General Motors.
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2003 - Sierra Denali

A
Accessory Power Outlets.................................3-16
Adding Washer Fluid.......................................5-35
Additional Program Information........................... 7-8
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-91
Add-On Equipment..........................................4-50
Adjusting the Speakers (Balance/Fade)..............3-60
After Off-Road Driving.....................................4-30
Air Bag
Off Light.....................................................3-28
Passenger Status Indicator...........................3-31
Readiness Light..........................................3-27
Air Bag Systems.............................................1-55
Adding Equipment to Your Air Bag-Equipped
Vehicle...................................................1-71
Air Bag Off Switch.......................................1-61
How Does an Air Bag Restrain?....................1-59
Passenger Sensing System...........................1-66
Servicing Your Air Bag-Equipped Vehicle.........1-70
What Makes an Air Bag Inflate?....................1-59
What Will You See After an Air Bag Inflates?......1-59
When Should an Air Bag Inflate?...................1-58
Where Are the Air Bags?
..............................1-57
Air Cleaner/Filter, Engine
.................................5-18
Air Conditioning
..............................................3-21
All Overseas Locations
...................................... 7-4
All-Wheel Drive
...............................................5-45
All-Wheel Drive (AWD) System
.........................2-21AM ...............................................................3-76
Antenna, Fixed Mast.......................................3-78
Antenna, XM™ Satellite Radio Antenna System.....3-78
Anti-lock Brake System..................................... 4-6
Anti-Lock Brake, System Warning Light..............3-35
Appearance Care............................................5-82
Care of Safety Belts....................................5-84
Chemical Paint Spotting...............................5-88
Cleaning the Inside of Your Vehicle................5-83
Cleaning the Outside of Your Vehicle..............5-85
Finish Damage............................................5-87
GM Vehicle Care/Appearance Materials..........5-88
Sheet Metal Damage...................................5-87
Underbody Maintenance...............................5-87
Weatherstrips..............................................5-85
Approaching a Hill..........................................4-23
Ashtrays........................................................3-17
Audio System(s).............................................3-56
Audio Steering Wheel Controls......................3-76
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
Fixed Mast Antenna
.....................................3-78
Navigation/Radio System
..............................3-70
Radio with Cassette and CD
.........................3-57
Rear Seat Audio (RSA)
................................3-71
Setting the Time
..........................................3-57
Theft-Deterrent Feature
................................3-75
Understanding Radio Reception
.....................3-76
1
2003 - Sierra Denali

Audio System(s) (cont.)
XM™Satellite Radio Antenna System............3-78
Automatic Headlamp System............................3-12
Automatic Transmission
Fluid..........................................................5-20
Operation...................................................2-19
Automatic Transmission Check..........................6-11
Automatic Transmission Shift Lock Control
System Check.............................................6-12
B
Backing Up....................................................4-58
Battery..........................................................5-39
BATTERY NOT CHARGING.............................3-52
Battery Replacement......................................... 2-5
Battery Run-Down Protection............................3-16
Battery Warning Light......................................3-33
Before Leaving on a Long Trip.........................4-37
Before You Go Off-Roading..............................4-18
Body Lubrication Service..................................6-11
Brake
Parking......................................................2-22
System Inspection.......................................6-15
System Warning Light..................................3-34
Brake Adjustment............................................5-38
Brake Fluid....................................................5-36
Brake Pedal Travel.........................................5-38
Brake Wear...................................................5-38
Brakes..........................................................5-36Braking........................................................... 4-5
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-15
Bulb Replacement...........................................5-48
Center High-Mounted Stoplamp (CHMSL)
and Cargo Lamp......................................5-52
Front Turn Signal, Sidemarker and Daytime
Running Lamps........................................5-49
Halogen Bulbs............................................5-48
Headlamps.................................................5-48
Pickup Box Identification and Fender
Marker Lamps.........................................5-54
Replacement Bulbs......................................5-55
Roof Marker Lamps.....................................5-51
Taillamps....................................................5-54
Buying New Tires...........................................5-60
C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-6
Capacities and Specifications............................5-99
Car Washes for QUADRASTEER™Equipped
Vehicles.....................................................4-14
Carbon Monoxide...................4-40, 4-53, 2-10, 2-26
Care of
Safety Belts................................................5-84
Your Cassette Tape Player............................3-77
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2003 - Sierra Denali