trailer GMC SIERRA DENALI 2003 Owner's Guide

Center Instrument Panel Fuse Block
The center instrument panel utility block is located
underneath the instrument panel, to the left of the
steering column.
Device Special Equipment ODtion
SEO Usage
TRAILER Upfitter (Not Used)
UPFIT Trailer
Brake Wiring
1 SL RIDE I
Ride Control Harness
Connection
I Device I Usage I
HDLR 2
Bodv Wiring Connector
BODY Headliner Wiring
connector-
DEFOG Headliner Wiring Connector
1 HDLNR 1
Rear Defogger Relay
I SPARE RELAY I Not Used I
CB SEAT Driver
and Passenger Seat
Module Circuit Breaker
I CB RT DOOR I
Right Power Windows Circuit
Breaker
I
I SPARE I Not Used I
I INFO I
~-
Infotainment Harness
Connection
1
5-98

*I - Gasoline Engine and Diesel Engine.
*2 - Gasoline Engine; ECMRPV - Diesel Engine.
*3 - Gasoline Engine; FUEL HT - Diesel Engine.
*4 - Gasoline Engine; ECM f - Diesel Engine.
*5 - IGN/EDU
r Fuses
GLOW PLUG
CUST FEED
STUD
#I
MBEC
BLOWER
LBEC Only)/ Dual Battery
(TP2)
Do not install fuse.
Mid Bussed Electrical Center
Power Feed, Front Seats,
Riaht Doors TRL
PARK Parking Lamps Trailer Wiring
RR PARK Right
Rear Parking and
Sidemarker LamDs
TBC BATT Truck Body
Controller Battery
I Feed
5-1 01

Fuses Usage
4WS Canister/QUADRASTEERTM
RR HVAC Not Used
Vent
Solenoid
Module Power
AUX PWR IGN
1 Ignition Relay
PCM
1
Auxiliary Power
Outlet
- Console
Electronic Throttle Control,
IGN E
Rday
RTD Ride Control
TRL B/U
PCM B
~~ ~-
Backup Lamps Trailer Wiring
Powertrain Control Module,
Fuel Pump
-. - . . -. . . .
F/PM P
B/U LP Transmission Shift Lock
r
Fuel Pump (Relay)
Back-up Lamps, Automatic
Control System
RR DEFOG Rear Window Defogger SIR
FRT PARK
DRL Daytime Running Lamps
I (Relav)
SEO IGN
TBC IGNI Truck Body Controller Ignition \~ ------I
Rear Defog Relay
HI HDLP-LT High Beam Headlamp-Left
LH HID Not Used
DRL Daytime Running Lamps
IPC/DIC Instrument
Panel
Cluster/Driver Information Center
5-1 02

22,500 Miles (37 500 km)
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page 5-62 for proper rotation pattern and additional
information.
(See footnote +.)
0 Rotate tires. See Tire Inspection and Rotation on
30,000 Miles (50 000 km)
CI Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page 5-62 for proper rotation pattern and additional
information.
(See footnote +.)
0 Replace fuel filter. An Emission Control Service. (See
0 Rotate tires. See Tire Inspection and Rotation on
footnote
t.)
Control Service.
Ll Replace engine air cleaner filter. An Emission
37,500 Miles (62 500 km)
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle
s
for leaking.
0 Rotate tires. See Tire Inspection and Rotation on
ea1 S
45,000 Miles (75 000 km)
0 Inspect engine air cleaner filter if you are driving in
dusty conditions. Replace filter
if necessary. An
Emission Control Service. (See footnote
t.)
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page 5-62 for proper rotation pattern and additional
information.
(See footnote +.)
CI Rotate tires. See Tire Inspection and Rotation on
50,000 Miles (83 000 km)
0 Change automatic transmission fluid and filter 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.
If you do not use your vehicle under any of these
conditions, change the fluid and filter at
100,000 miles
(166
000 km).
page 5-62
for proper rotation pattern and additional
information.
(See footnote +.)
6-7

90,000 Miles (150 000 km)
0 Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
0 Replace fuel filter. An Emission Control Service. (See
Footnote
t.)
0 Replace engine air cleaner filter. An Emission
Control Service.
0 Rotate tires. See Tire Inspection and Rotation on
page 5-62
for proper rotation pattern and additional
information.
(See footnote +.)
97,500 Miles (162 500 km)
c[I Check readfront axle fluid level and add fluid as
needed. Check constant velocity joints and axle seals
for leaking.
page 5-62 for proper rotation pattern and additional
information.
(See footnote +.)
0 Rotate tires. See Tire Inspection and Rotation on
100,000 Miles (166 000 km)
0 Inspect spark plug wires. An Emission Control
0 Replace spark plugs. An Emission Control Service.
Service.
0 Change automatic
transmission fluid and filter 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.
0 If you haven’t used your vehicle under severe service
conditions listed previously and, therefore, haven’t
changed your automatic transmission fluid, change
both the fluid and filter.
0 Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)
0 Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
See
Engine Coolant on page 5-24 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
0 Inspect engine accessory drive belt. An Emission
Control Service.
6-9

Driving Through Flowing Water ..................... 4-32
Driving with a Trailer
....................................... 4-56
Dual Automatic Climate Control System
.......... 3-18
E
Easy Exit Seat .................... .... 2-43
Electrical System
Add-on Equipment
...................................... 5-95
Fuses and Circuit Breakers
........................... 5-95
Power Windows and Other Power Options
...... 5-95
Windshield Wiper Fuses
............................... 5-95
Electrochromic Mirror Operation
........................ 2-28
Maintenance Programs
................................. 3-40
Air CleanedFilter
......................................... 5-1 9
Battery
....................................................... 5-42
Check and Service Engine Soon Light
............ 3-38
Coolant
...................................................... 5-24
Coolant Heater
............................................ 2-17
Coolant Temperature Gage
........................ 3-36
Cooling System Inspection
......................... 6-14
Engine Compartment Overview
...................... 5-1 2
Exhaust
..................................................... 2-26
Fan Noise
.................................................. 5-36
Oil
............................................................. 5-13
Overheating
................................................ 5-27
Starting
...................................................... 2-1 6
Emissions
Inspection and
Engine ENGINE COOLANT HOT
................................. 3-54
Engine Coolant Level Check
............................. 6-10
Engine Hour Meter Display
............................... 3-26
Engine
Oil and Chassis Lubrication Scheduled
Engine
Oil Additives
........................................ 5-17
Engine Oil Level Check
................................... 6-10
Entry Lighting
......................... ............. 3-15
Maintenance
................................................. 6-5
ENGINE OVERHEATED
.................................. 3-54
Erasing HomeLink@ Buttons
...... ......... 2-38
Exit Lighting
............................... ............. 3-15
Express-Down Windows
................................... 2-11
Extender, Safety Belt
....................................... 1-29
Exterior Lamps
............................................... 3-11
F
FabridCarpet ................................................. 5-87
Engine Air Cleaner
...................................... 5-19
Filter
Finding
a PTY Station
(RDS, XMTM and DAB)
................................. 3-67
Finding a Station
............................................ 3-64
Finish Care
.................................................... 5-89
Finish Damage
............................................... 5-91
Fixed Mast Antenna
........................................ 3-84
Flash-To-Pass Feature
....................................... 3-6
Flat Tire
........................................................ 5-68
Flat Tire, Changing
......................................... 5-69

Headlamps (cont.) Halogen Bulbs
............................................ 5-52
Pickup Box Identification and Fender
Marker Lamps
......................................... 5-58
Roof Marker Lamps
..................................... 5-54
Heated Seats
................................................... 1-3
Highway Hypnosis
........................................... 4-36
Hill and Mountain Roads
.................................. 4-36
Hitches
.......................................................... 4-55
HomeLink@ Transmitter
.................................... 2-35
Hood Checking Things Under
................................ 5-10
Release
..................................................... 5-1 0
Horn ............................................................... 3-4
How to Add Coolant
to the Coolant
Surge Tank
................................................. 5-32
How
to Add Fluid ............................................ 5-23
How
to Check ........................................ 5-21, 5-62
How to Check Lubricant
................................... 5-50
How to Use This Manual
.............. ......... ii
How to Wear Safety Belts Properly ................... 1-1 3
HomeLink@ Transmitter, Programming
................ 2-35
How to Check Power Steering Fluid
.................. 5-37
Hydroplaning
.................................................. 4-32
I
if No Steam Is Coming From
Your Engine
................................................ 5-29
If Steam
Is Coming From Your Engine ............... 5-28
If the Light is Flashing ..................................... 3-39
If the Light is On Steady
................................. 3-39
If You Are Stuck in Sand, Mud, Ice or Snow
....... 4-42
If You Do Decide To Pull A Trailer ..................... 4-51
If You’re Caught in a Blizzard ........................... 4-40
Ignition Transmission Lock Check
...................... 6-13
Illuminated Visor Vanity Mirrors
......................... 2-12
infants and Young Children, Restraints
............... 1-32
Inflation
- Tire Pressure ................................... 5-62
inspection Ignition Positions
............................................. 2-15
Brake System
............................................. 6-15
Exhaust System
.......................................... 6-14
Fuel System
............................................... 6-14
Engine Cooling System
................................ 6-14
Part
C - Periodic Maintenance ....................... 6-14
Steering and Suspension
.............................. 6-14
Cluster
....................................................... 3-25
Overview
..................................................... 3-2
Instrument Panel
7

M
Maintenance. Normal Replacement Parts .......... 5-1 05
Maintenance Schedule
At Each Fuel Fi!!
......................................... 6-10
At Least Once a Month ................................ 6-10
At Least Once a Year
.................................. 6-1 1
At Least Twice a Year .................................. 6-1 1
Brake System Inspection
.............................. 6-15
Engine Cooling System Inspection
................. 6-14
Exhaust System Inspection
........................... 6-1 4
How This Section is Organized
....................... 6-3
Introduction
.................................................. 6-2
Maintenance Requirements
............................. 6-2
Part
A - Scheduled Maintenance Services ......... 6-4
Part
B - Owner Checks and Services ............. 6-10
Part C
- Periodic Maintenance Inspections ...... 6-1 4
Part D
- Recommended Fluids and
Lubricants
............................................... 6-1 6
Part E
- Maintenance Record ........................ 6-1 8
Scheduled Maintenance
................................. 6-5
Steering and Suspension Inspection
............... 6-14
Your Vehicle and the Environment
................... 6-2
Maintenance When Trailer Towing
..................... 4-59
Fuel
System Inspection
................................ 6-14
Using Your
................................................... 6-4
Making Turns
................................................. 4-57
Malfunction Indicator Light
................................ 3-38
Matching Transmitter(s) to Your Vehicle
............... 2-5
Memory Seat ................................................. 2-42
..... 3-53
Message
DIC Warnings and Messages ...............
Mexico. Central America and Caribbean
Islands/Countries (Except Puerto Rico
and
U.S. Virgin Islands) ................................. 7-4
Mirrors Automatic Dimming Rearview with Onstar@,
Compass and Temperature Display
............. 2-28
Outside Automatic Dimming Mirror
................. 2-31
Outside Convex Mirror
................................. 2-32
Outside Curb View Assist Mirrors
................... 2-32
Outside Heated Mirrors
............... ......... 2-32
Outside Power Foldaway Mirrors
.................... 2-31
Outside Power Mirrors
.................................. 2-31
MyGMLink.com
................................................ 7-3
New Vehicle Break-In
.........................
Normal Maintenance Replacement Parts ....
..... 2-15
.... 5-105
Odometer ...................................................... 3-26
Off-Road Recovery
.......................................... 4-13
Oil Engine
....................................................... 5-13
Pressure Gage
............................................ 3-40
OIL LIFE RESET
............................................ 3-54
9

Taillamps ....................................................... 5-58
Temperature and Compass Display
.................... 2-28
Testing the Alarm
............................................ 2-14
Theft.Deterrent. Radio
..................................... 3-81
Theft-Deterrent Systems
................................... 2-1 3
Content Theft-Deterrent
................................ 2-1 3
Passlock@
................................................... 2-1 4
Tilt Wheel
........................................................ 3-4
Tire Inflation Check
......................................... 6-10
Tires
..................................................... 5.61. 5-90
Buying New Tires
........................................ 5-64
Chains
....................................................... 5-68
Changing a Flat Tire
.................................... 5-69
If a Tire Goes Flat ....................................... 5-68
Inflation
- Tire Pressure ............................... 5-62
Inspection and Rotation
................................ 5-62
Spare Tire
.................................................. 5-85
Uniform Tire Quality Grading
......................... 5-65
Wheel Alignment and Tire Balance
................. 5-67
Wheel Replacement
..................................... 5-67
When It
Is Time for New Tires ...................... 5-64
To Use the Engine Coolant Heater .................... 2-18
Tonneau Cover
............................................ 2-39
Top of the Instrument Panel
.......... ........ 5-87
Top Strap
...................................................... 1-40
Top Strap Anchor Location
............................... 1-41
Torque Lock
................................................... 2-25
Total Weight on Your Vehicle’s Tires
.................. 4-55 Tow/Haul
Mode
............................................... 2-21
Tow/Haul Mode Light
....................................... 3-41
Towing Recreational Vehicle
..................................... 4-45
Towing a Trailer
.......................................... 4-51
Your Vehicle
............................................... 4-45
TRACTION ACTIVE
.................................... 3-58
Trailer Recommendations
....................................... 4-50
Trailer Brakes
................................................. 4-56
Trailer Wiring Harness
..................................... 4-60
Transfer Case
................................................ 5-49
Transmission Fluid, Automatic
.......................... ......... 5-21
Temperature Gage
....................................... 3-36
TRANSMISSION HOT
..................................... 3-59
Transmission Operation, Automatic
.................... 2-18
Transmission, Transaxle, Transfer Case Unit Repair Manual
............................................ 7-10
Transportation Options
...................................... 7-7
Trip Information Button
....................... ..... 3-44
Trip Odometer
................................................ 3-26
Truck-Camper Loading Information
.................... 4-48
Turn and Lane Change Signals
.......................... 3-5
Turn SignaVMultifunction Lever ........................... 3-5
Turn Signals When Towing a Trailer
.................. 4-57
Two-Tiered Loading
......................................... 4-47
TURN
SIGNAL ON
......................................... 3-56
14

W
Underbody Flushing Service ............................. 6-1 3
Underhood Fuse Block
.................................... 5-99
Understanding Radio Reception
........................ 3-82
Using HomeLink@
........................................... 2-38
Using the Recovery Hooks
............................ 4-43
Uniform Tire
Quality Grading
............................ 5-65
United States
................................................... 7-4
v
Vehicle
Control
....................................... ......... 4-5
Damage Warnings
........................................ iv
Loading
....................................... ........ 4-45
Symbols
......................................................... iv
Vehicle Identification
Number (VIN)
............................................. 5-94
Service Parts Identification Label
................... 5-94
Vehicle Personalization Memory Seat
.......................................... 2-42
Vehicle Storage
.............................................. 5-43
Vinyl
............................................................. 5-87
Visors
........................................................... 2-1 2
Voltmeter Gage
.......................................... 3-33 Warning Lights. Gages and
Indicators
................ 3-24
Warnings DIC Warnings and Messages
........................ 3-53
Other Warning Devices
.................................. 3-4 ...
Safety and Symbols ......................................... III
Washing Your Vehicle ...................................... 5-88
Hazard Warning
Flashers
............................... 3-3
Vehicle Damage .............................................. iv
Weatherstrip Lubrication
................................... 6-11
Weight of the Trailer
........................................ 4-53
Weight of Trailer Tongue
.................................. 4-54
What to Add
.................................................. 5-40
What to
Do with Used Oil ................................ 5-18
What
Kind
of Engine Oil to Use ........................ 5-16
What to Use
.......................... 5-25, 5-37, 5-38, 5-50
Wheels Alignment and Tire Balance
.......................... 5-67
Replacement
............................................... 5-67
When to Add Engine Oil
.................................. 5-15
(GM Oil Life SystemTM)
................................ 5-17
When
to Change Engine Oil
When to Check
.............................................. 5-62
When to Check and Change
............................ 5-21
When to Check Lubricant
................................. 5-50
15