2003 GMC SIERRA DENALI key

At Least Twice a Year
Restraint System Check
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.)
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 5-88.
Spare Tire Check
At least twice a year, after the monthly inflation check of
the spare tire determines that the spare is inflated to
the correct tire inflation 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
wrenchhatchet to tighten the cable. See
Changing a Flat
Tire on page 5-69.
Weatherstrip
Silicone grease on
longer, seal better,
Lubrication
weatherstrips will make them last
and not stick or squeak. Apply
silicone grease with a clean cloth. During very -cold,
damp weather more frequent application may be
required. See
Part D: Recommended Fluids and
lubricants on page
6- 16.
Automatic Transmission Check
Check the transmission fluid level; add if needed. See
Automatic Transmission Fluid on page 5-27. A fluid 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
specified 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.
6-1 1

Starter Switch Check Automatic Transmission Shift Lock
Contr-l System Check
When you are doing this check, the vehicle
could move suddenly.
If it does, you or others
could be injured. Follow the steps below.
1
1.
2.
3.
Before you start, be sure you have enough room
around the vehicle.
Firmly apply both the parking brake and the regular
brake. See
Parking Brake on page 2-22 if
necessary.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately
if it starts.
Try
to start the engine in each gear. The starter
should work only in PARK (P) or NEUTRAL
(N).
If the starter works in any other position, your
vehicle needs service.
I
_/hen you are doing _.. check, tl vel le
could move suddenly.
If it does, you or others
could be injured.
Follow the steps below.
I
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
2. Firmly apply the parking brake. See Parking Brake
on page 2-22 if necessary.
Be ready
to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, but don’t start the engine. Without applying
the regular brake, try
to move the shift lever out
of PARK (P) with normal effort.
If the shift lever
moves out of PARK (P), your vehicle needs service.
6-1 2

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
* The key should turn to LOCK only when the
The key should come out only in LOCK.
shift lever
is in PARK (P).
Parking Brake and Automatic
Transmission Park (P) Mechanism
A. le1 , ..
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there
is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move. Park on a
fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
@ To check the parking brake’s holding ability: With
the engine running and transmission in
NEUTRAL
(N), slowly remove foot pressure from the regular
brake pedal.
Do this until the vehicle is held by the
parking brake only.
ability: With the engine running, shift to PARK (P).
Then release the parking brake followed by the
regular brake.
To check the PARK (P) mechanism’s holding
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-1 3

Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number or specification may be obtained from your
dealer.
Engine Oil
Engine Coolant
Hydraulic Brake
System
Windshield
Washer Solvent
Power Steering
System
~~
Automatic
Transmission Fluid/Lubricant
Engine oil with the American
Petroleum Institute Certified for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see
Engine Oil on
Daae
5- 13.
50/50 mixture of clean, drinkable
water and use only DEX-COOL
Coolant. See
Engine Coolant on
page
5-24.
Delco Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
GM Optikleen Washer Solvent or
equivalent.
GM Power Steering Fluid (GM Part
No.
U.S. 1052884, in Canada
993294, or equivalent).
DEXRON-Ill Automatic Transmission
Fluid. Usage
FluWLubricant
Multi-Purpose Lubricant, Superlube
Key Lock
Canada 10953474. or eauivalent). Cylinders (GM Part No. U.S. 12346241, in
Floor Shift
Linkage
Chassis
Lubrication Lubriplate
Lubricant Aerosol (GM
Part No.
US. 12346293, in Canada
' 992723, or equivalent) or lubricant
meeting requirements of NLGl #2
Category LB or GC-LB.
Chassis Lubricant (GM Part
No.
U.S. 12377985, in Canada
88901242, or equivalent) or lubricant
meeting requirements of NLGl #2,
Cateaow LB or GC-LB.
SAE 75W-90 Synthetic Axle
Lubricant (GM Part No.
U.S.
Front Axle 12378261, in Canada 10953455) or
equivalent meeting GM Specification
99861 15.
Synthetic Axle Lubricant; use only
Rear Axle
88901362).
Do not add friction
(Steerable) GM Part
No. 12378557
(in Canada
modifier.
Transfer Case
I Fluid.
DEXRON-Ill Automatic Transmission
Chassis Lubricant (GM Part No.
U.S. 12377985,
in Canada Rear Driveline
meeting requirements of NLGI #2, Center Spline 88901242, or equivalent) or lubricant
CateqorV LB or GC-LB.
6-1 6

GM Mobility Program for Persons
with Disabilities
This program, available to
qualified 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 Sewice: Towing to the nearest GMC
dealer for warranty related disablements will be
covered.
7-5

Instrument Panel Brightness Control .................. 3-1 5
Instrument Panel Fuse Block ............................ 5-96
Interior Lamps
................................................ 3-1 5
Interior Plastic Components .............................. 5-87
Introduction Transfer Case (All-Wheel Drive) Inspection
...... 6-1 5
J
Jump Starting ................................................. 5-43
Key Lock Cylinders Service
.............................. 6-1 1
Keyless Entry System ....................................... 2-3
Keys
............................................................... 2-2
Lamps Exterior
...................................................... 3-1 1
Interior
....................................................... 3-1 5
Lamps On Reminder ....................................... 3-12
Lap Belt
............................................. ... 1-23
Lap-Shoulder Belt
......................... , ... 1-13
LATCH System Child Restraints
......... ...................... 1-43 LATCH System (cont.)
Securing a Child Restraint Designed for the
LATCH System
........................................ 1-46
Leather
......................................................... 5-87
Leaving Your Vehicle With the
Engine Running
.............. ......... 2-24
Light Air Bag
Off ................................. ......... 3-28
Anti-Lock Brake System Warning
................... 3-35
Battery Warning
.......................................... 3-33
Brake System Warning
................................. 3-34
Cruise Control
............................................. 3-41
Low Fuel Warning
................................... 3-42
Malfunction Indicator
................................ 3-38
Passenger Air Bag Status Indicator
............ 3-30
Safety Belt Reminder
............................... 3-26
Tow/Haul Mode
........................................... 3-41
Loading Your Vehicle
....................................... 4-45
Locks Air Bag Readiness
....................... , ........ 3-27
Locking Rear Axle
............................................ 4-8
Door ...................... .................. 2-6
Power Door
.............................................. 2-7
Loss of Control ..............., ............................ 4-15
LOW COOLANT LEVEL
............................... 3-54
Low Fuel Warning Light
................................ 3-42
Lumbar Power Controls
............................................. 1-3
.....

Payload ...................................................... 4-47
Personalization Button
..................................... 3-47
Pickup Conversion to Chassis Cab
.................... 4-50
Playing a Cassette Tape
.................................. 3-72
Playing a Compact Disc
................................... 3-74
Power
Playing
the Radio
........................................... 3-63
Accessory Outlets
........................................ 3-1 6
Electrical System
......................................... 5-95
Lumbar Controls
........................................... 1-3
Seat
............................................................ 1-2
Steering Fluid
............................................. 5-37
Windows
.................................................... 2-1 1
Power Steering ................................................ 4-9
Programming the HomeLink@ Transmitter
........... 2-35
Puddle Lamps
................................................ 3-13
Door Locks
.................................................. 2-7
Q
QUADRASTEERTM ......................................... 4-10
Questions and Answers About Safety Belts
......... 1-12 Radios (cont.)
CD Changer
............................................... 3-78
Rear Seat Audio
.......................................... 3-76
Theft-Deterrent
............................................ 3-81
Understanding Reception
.............................. 3-82
Rear Axle
...................................................... 5-50
Locking
........................................................ 4-8
Rear Doors
...................................................... 2-8
Rear Safety Belt Comfort Guides
...................... 1-27
Rear Seat Audio
............................................. 3-76
Rear Seat Audio Controls
................................. 3-77
Rear Seat Operation
......................................... 1-7
Rear Seat Outside Passenger Positions
............. 1-24
Rear Seat Passengers, Safety Belts
.................. 1-24
Rear Seat Top Strap Anchors
........................... 1-42
Rear Window Defogger
.................................... 3-22
DAB
Radio Antenna System
.......................... 3-84
Radio with Cassette and CD
......................... 3-62
Setting the Time
.......................................... 3-61
RDS and DAB Messages
................................. 3-68
Rearview Mirror, Automatic Dimming with
Onstar@, Compass and Temperature
Disdav
............................................. ...... 2-28 Id ..........................................
R
Reclining Seatbacks 1-4
Recreational Vehicle Towing
............................. 4-45
............................. Radio Messages 3-69
Radios 3-61 REDUCED BRAKE POWER
3-57
REDUCED ENGINE POWER 3-54 .............................................
........................... ..........................................................
Care of Your Cassette Tape Player ................ 3-83 Remote Alarm .................................................. 2-4
Care of Your CD Player
............................... 3-84 kxr~ote Keyless EntV System ............................ 2-3
Care of Your CDs
........................................ 3-84 Remote Keyless Entry System, Operation ............ 2-4
11