2003 GMC SIERRA door lock

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

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

Cleaning the Windshield and Wiper Blades.........5-86
Cleaning Tires................................................5-87
Cleaning Vinyl................................................5-83
Cleaning Wood Panels....................................5-84
Climate Control System
Dual Automatic............................................3-18
Compact Disc Changer Errors..........................3-75
Compact Disc Messages..................................3-70
Compass Calibration.......................................2-30
Compass Variance..........................................2-29
Content Theft-Deterrent....................................2-13
Control of a Vehicle.......................................... 4-5
Coolant
Engine Temperature Gage............................3-36
Heater, Engine............................................2-18
Surge Tank Pressure Cap.............................5-26
Cooling System..............................................5-29
Cruise Control.................................................. 3-8
Cruise Control Light........................................3-40
Cupholder(s)..................................................2-39
Current and Past Model Order Forms................7-10
Customer Assistance Information
Courtesy Transportation
.................................. 7-7
Customer Assistance for Text Telephone (TTY)
Users
....................................................... 7-3
Customer Assistance Offices
........................... 7-4
Customer Satisfaction Procedure
..................... 7-2
GM Mobility Program for Persons with
Disabilities
................................................ 7-5
Reporting Safety Defects to General Motors
...... 7-9Customer Assistance Information (cont.)
Reporting Safety Defects to the Canadian
Government.............................................. 7-9
Reporting Safety Defects to the United States
Government.............................................. 7-8
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information......... 7-9
D
Daytime Running Lamps..................................3-13
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-22
Doing Your Own Service Work........................... 5-3
Dome Lamps .................................................3-16
Door
Locks.......................................................... 2-6
Power Door Locks......................................... 2-7
Programmable Automatic Door Locks............... 2-7
Rear Doors.................................................. 2-9
Driver
Position, Safety Belt.....................................1-12
DRIVER DOOR AJAR.....................................3-56
Driver Information Center (DIC).........................3-42
DIC Operation and Displays..........................3-42
DIC Warnings and Messages........................3-51
Driving
At Night.....................................................4-30
City ...........................................................4-35
Defensive..................................................... 4-2
4
2003 - Sierra Denali

Instrument Panel
Cluster.......................................................3-25
Overview..................................................... 3-2
Instrument Panel Brightness Control..................3-15
Instrument Panel Fuse Block............................5-92
Interior Lamps................................................3-15
J
Jump Starting.................................................5-40
K
Key Lock Cylinders Service..............................6-11
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Lamps
Exterior......................................................3-11
Interior.......................................................3-15
Lamps On Reminder.......................................3-13
Lap Belt........................................................1-22
Lap-Shoulder Belt...........................................1-12
LATCH System
Child Restraints...........................................1-42LATCH System (cont.)
Securing a Child Restraint Designed for
the LATCH System...................................1-45
Leaving Your Vehicle With the Engine Running......2-24
Light
Air Bag Off .................................................3-28
Air Bag Readiness.......................................3-27
Anti-Lock Brake System Warning...................3-35
Battery Warning..........................................3-33
Brake System Warning.................................3-34
Cruise Control.............................................3-40
Low Fuel Warning.......................................3-41
Malfunction Indicator....................................3-37
Passenger Air Bag Status Indicator................3-31
Safety Belt Reminder...................................3-27
Tow/Haul Mode ...........................................3-41
Loading Your Vehicle.......................................4-47
Loading Your Vehicle for Off-Road Driving..........4-19
Locking Rear Axle...........................................4-10
Locks
Door ........................................................... 2-6
Power Door.................................................. 2-7
Programmable Automatic Door Locks............... 2-7
Loss of Control...............................................4-16
LOW COOLANT LEVEL..................................3-52
Low Fuel Warning Light...................................3-41
Lumbar
Power Controls............................................. 1-3
8
2003 - Sierra Denali

O
Odometer......................................................3-26
Off-Road Recovery..........................................4-15
Oil
Engine.......................................................5-13
Pressure Gage............................................3-40
OIL LIFE RESET............................................3-52
OIL PRESSURE LOW .....................................3-52
Older Children, Restraints................................1-29
Online Owner Center........................................ 7-3
OnStar
®Personal Calling.................................2-34
OnStar®Services............................................2-33
OnStar®Steering Wheel Controls......................2-34
OnStar®System.............................................2-33
OnStar®Virtual Advisor....................................2-34
Operating Your All-Wheel-Drive Vehicle Off
Paved Roads..............................................4-18
Other Warning Devices...................................... 3-4
Outlet Adjustment............................................3-23
Outside
Automatic Dimming Mirror.............................2-32
Convex Mirror
.............................................2-32
Curb View Assist Mirrors
..............................2-32
Heated Mirrors
............................................2-32
Power Foldaway Mirrors
...............................2-31
Power Mirrors
.............................................2-31
Overheated Engine Protection Operating Mode
.....5-26
Owners, Canadian
............................................... ii
Owner’s Information
........................................7-10
P
Park (P)
Shifting Out of............................................2-25
Parking
Brake........................................................2-22
Over Things That Burn.................................2-26
Parking Brake and Automatic Transmission
Park (P) Mechanism Check...........................6-13
Parking on Hills..............................................4-60
Park(P)
Shifting Into................................................2-23
Part A - Scheduled Maintenance Services............ 6-4
Part B - Owner Checks and Services................6-10
Part C - Periodic Maintenance Inspections..........6-14
Part D - Recommended Fluids and Lubricants....6-15
PartE-Maintenance Record...........................6-17
Passenger Air Bag Indicator.............................2-30
Passenger Air Bag Status Indicator...................3-31
PASSENGER DOOR AJAR..............................3-56
Passenger Sensing System..............................1-66
Passing.................................................4-15, 4-58
Passlock
®......................................................2-15
Payload.........................................................4-49
Personalization Button.....................................3-46
Pickup Conversion to Chassis Cab
....................4-52
Plan Ahead When Possible
................................ 7-7
Playing a Cassette Tape
..................................3-65
Playing a Compact Disc
...................................3-68
Playing the Radio
...........................................3-58
10
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
11
2003 - Sierra Denali