trailer GMC ENVOY 2003 Owner's Guide

Fuses Usage
22 Retained Accessory Power
23 Blank
24 Unlock
25 Blank
26 Blank
27 OH Battery/OnStar
žSystem
28 Sunroof
29 RainsenseŸ Wipers
30 Parking Lamps
31Truck Body Controller 4 Cruise
Control
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Blank
36 Heat Ventilation Air Conditioning B
37 Front Parking Lamps
Fuses Usage
38 Left Turn Signal
39 Heat Ventilation Air Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44 Heat Ventilation Air Conditioning
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
5-101

50,000 Miles (83 000 km)
qChange automatic transmission ¯uid and ®lter if the
vehicle is mainly driven under one or more of these
conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC) or
higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the ¯uid and ®lter at 100,000 miles
(166 000 km).
qAutomatic Transfer Case Only: Change transfer case
¯uid.
52,500 Miles (87 500 km)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
qRotate tires. See
Tire Inspection and Rotation on
page 5-55for proper rotation pattern and additional
information.(See footnote +.)
60,000 Miles (100 000 km)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
qRotate tires. See
Tire Inspection and Rotation on
page 5-55for proper rotation pattern and additional
information.(See footnote +.)
qReplace fuel ®lter.An Emission Control Service. (See
footnote ².)
qReplace engine air cleaner ®lter on vehicles without
a restriction indicator. If equipped with a change
indicator, inspect the indicator. If necessary, replace
the ®lter. If vehicle is driven in dusty/dirty conditions,
inspect the change indicator (if equipped) at every
engine oil change. See
Engine Air Cleaner/Filter on
page 5-20for more information.An Emission
Control Service. (See footnote ².)
67,500 Miles (112 500 km)
qCheck rear/front axle ¯uid level and add ¯uid as
needed. Check constant velocity joints and axle seals
for leaking.
qRotate tires. See
Tire Inspection and Rotation on
page 5-55for proper rotation pattern and additional
information.(See footnote +.)
6-8

100,000 Miles (166 000 km)
qV8 Engine Only: Inspect spark plug wires.An
Emission Control Service.
qReplace spark plugs.An Emission Control Service.
qChange automatic transmission ¯uid and ®lter if
the vehicle is mainly driven under one or more
of these conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC) or
higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission ¯uid, change
both the ¯uid and ®lter
qAutomatic Transfer Case Only: Change transfer case
¯uid.
qV8 Engine Only: Inspect Positive Crankcase
Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-24for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
qInspect engine accessory drive belt.An Emission
Control Service.
6-10

Convenience Net............................................2-49
Coolant.........................................................3-41
Engine Temperature Gage............................3-41
Heater, Engine............................................2-22
Cooling System..............................................5-29
Cruise Control Light........................................3-47
Cruise Control................................................3-12
Current and Past Model Order Forms................7-11
Customer Assistance Information........................ 7-7
Courtesy Transportation.................................. 7-7
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-4
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....7-10
Reporting Safety Defects to the Canadian
Government.............................................. 7-9
Reporting Safety Defects to the United
States Government.................................... 7-9
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information........7-10
D
Daytime Running Lamps (DRL).........................3-16
Defensive Driving............................................. 4-2
Defogging and Defrosting.........................3-22, 3-27Delayed Locking............................................... 2-9
Dinghy Towing................................................4-46
Doing Your Own Service Work........................... 5-3
Dome Lamp Override......................................3-18
Dome Lamps.................................................3-19
Door............................................................... 2-9
Delayed Locking........................................... 2-9
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
DRIVER DOOR AJAR.....................................3-62
Driver Information Center (DIC).........................3-50
DIC Operation and Displays..........................3-51
DIC Warnings and Messages........................3-60
Driver............................................................1-14
Position, Safety Belt.....................................1-14
Driving Across an Incline..................................4-24
Driving Downhill..............................................4-23
Driving in Mud, Sand, Snow or Ice....................4-26
Driving in Water..............................................4-27
Driving On Grades..........................................4-58
Driving on Off-Road Hills.................................4-19
Driving on Snow or Ice....................................4-40
Driving Through Deep Standing Water...............4-31
Driving Through Flowing Water.........................4-32
Driving Uphill..................................................4-20
Driving with a Trailer.......................................4-56
Driving..........................................................4-28
At Night.....................................................4-28
4

Gate Operator and Canadian Programming........2-43
Getting Familiar with Off-Road Driving................4-17
Glove Box.....................................................2-44
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-5
Headlamp High/Low-Beam Changer.................... 3-8
Headlamp Washer..........................................3-11
Headlamps....................................................5-50
Bulb Replacement.......................................5-50
Electrical System.........................................5-89
Front Turn Signal and Sidemarker Lamps.......5-51
Halogen Bulbs............................................5-50
Headphones...................................................3-92
Heated Seats................................................... 1-3
Highway Hypnosis...........................................4-36
Hill and Mountain Roads..................................4-37
Hitches..........................................................4-55
HomeLink Transmitter, Programming..................2-41
HomeLink
žTransmitter....................................2-40
Hood............................................................5-10
Checking Things Under................................5-10
Release.....................................................5-10
Horn............................................................... 3-7How to Add Coolant to the Coolant
Recovery Tank............................................5-31
How to Add Coolant to the Radiator..................5-33
How to Add Fluid............................................5-23
How to Check Lubricant...................................5-48
How to Check Power Steering Fluid..................5-36
How to Check........................................5-22, 5-55
How to Inspect...............................................5-20
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
Hydroplaning..................................................4-31
I
ICE POSSIBLE..............................................3-62
If No Steam Is Coming From Your Engine..........5-28
If Steam Is Coming From Your Engine...............5-27
If the Light Is Flashing.....................................3-43
If the Light Is On Steady.................................3-43
If You Are Stuck in Sand, Mud, Ice or Snow.......4-44
If You Do Decide To Pull A Trailer.....................4-51
If You're Caught in a Blizzard...........................4-41
Ignition Positions.............................................2-19
Ignition Transmission Lock Check......................6-14
Infants and Young Children, Restraints...............1-32
In¯ation -- Tire Pressure..................................5-55
7

Light (cont.)
Reduced Engine Power................................3-47
Safety Belt Reminder...................................3-37
Security.....................................................3-46
Service Four-Wheel-Drive Warning Light.........3-48
Loading Your Vehicle for Off-Road Driving..........4-16
Loading Your Vehicle.......................................4-47
Locking Rear Axle...........................................4-10
Lockout Protection..........................................2-12
Locks............................................................. 2-9
Delayed Locking........................................... 2-9
Door........................................................... 2-8
Leaving Your Vehicle....................................2-12
Lockout Protection.......................................2-12
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-14
Low Fuel Warning Light...................................3-50
Luggage Carrier..............................................2-48
Lumbar........................................................... 1-2
Power Controls............................................. 1-2
M
Maintenance, Normal Replacement Parts..........5-104
Maintenance Schedule.....................................6-11
At Each Fuel Fill.........................................6-11
At Least Once a Month................................6-11Maintenance Schedule (cont.)
At Least Once a Year..................................6-13
At Least Twice a Year..................................6-12
Brake System Inspection..............................6-17
Engine Cooling System Inspection.................6-17
Exhaust System Inspection...........................6-16
Fuel System Inspection................................6-16
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.............6-11
Part C - Periodic MaintenanceInspections......6-16
Part D - Recommended Fluids and
Lubricants...............................................6-18
Part E - Maintenance Record........................6-20
Scheduled Maintenance................................. 6-5
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection..........................6-16
Transfer Case and Front Axle (Four-Wheel
Drive) Inspection......................................6-17
Using Your................................................... 6-4
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-59
Making Turns.................................................4-57
Malfunction Indicator Light................................3-42
Matching Transmitter(s) to Your Vehicle............... 2-6
Memory Seat.................................................2-51
9

Top Strap Anchor Location...............................1-41
Top Strap......................................................1-40
Torque Lock...................................................2-31
Total Weight on Your Vehicle's Tires..................4-54
Towing..........................................................4-45
Recreational Vehicle.....................................4-45
Towing a Trailer..........................................4-50
Your Vehicle...............................................4-45
Traction........................................................... 4-8
Assist System (TAS)...................................... 4-8
Trailer Brakes.................................................4-55
Trailer Wiring Harness.....................................4-60
TRANS HOT IDLE ENGINE.............................3-61
Transfer Case and Front Axle
(Four-Wheel Drive) Inspection.......................6-17
Transfer Case................................................5-48
Transmission Operation, Automatic....................2-23
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-10
Transmission..................................................5-21
Fluid, Automatic...........................................5-21
Transportation Options...................................... 7-7
Travel Note Recorder......................................2-45
Traveling to Remote Areas...............................4-17
Trip Information..............................................3-51
Trip Odometer................................................3-36
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-61
Turn Signal/Multifunction Lever........................... 3-7Turn Signals When Towing a Trailer..................4-57
Two-Wheel-Drive Vehicles................................4-46
U
Underbody Flushing Service.............................6-15
Understanding Radio Reception.......................3-105
Uniform Tire Quality Grading............................5-59
United States................................................... 7-4
Used Replacement Wheels..............................5-61
Using Cleaner on Fabric..................................5-81
Using HomeLink
ž...........................................2-43
Using RDS....................................3-67, 3-74, 3-84
Using Song List Mode.....................................3-90
V
Vehicle Identi®cation........................................5-88
Number (VIN).............................................5-88
Service Parts Identi®cation Label...................5-88
Vehicle Personalization....................................2-51
Memory Seat..............................................2-51
Vehicle Storage..............................................5-42
Vehicle............................................................ 4-5
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-47
Symbols......................................................... iv
15

Video Screen.................................................3-94
Visor Vanity Mirror..........................................2-16
Visors...........................................................2-16
Voltmeter Gage..............................................3-39
W
Warning Lights, Gages and Indicators................3-34
Warnings.......................................................3-60
DIC Warnings and Messages........................3-60
Hazard Warning Flashers............................... 3-6
Other Warning Devices.................................. 3-6
Safety and Symbols......................................... iii
Vehicle Damage.............................................. iv
Washing Your Vehicle......................................5-83
Weatherstrip Lubrication...................................6-12
Weight of the Trailer Tongue.............................4-54
Weight of the Trailer........................................4-52
What Kind of Engine Oil to Use........................5-17
What to Add..................................................5-39
What to Do with Used Oil................................5-19
What to Use..........................5-24, 5-36, 5-37, 5-48
Wheels..........................................................5-60
Alignment and Tire Balance..........................5-60
Replacement...............................................5-60
When to Add Engine Oil..................................5-16When to Change Engine Oil
(GM Oil Life System)...................................5-18
When to Check and Change............................5-21
When to Check Lubricant.................................5-48
When to Check Power Steering Fluid................5-36
When to Check..............................................5-55
When to Inspect.............................................5-20
When You Are Ready to Leave After
Parking on a Hill.........................................4-59
Where to Put the Restraint...............................1-39
Why Safety Belts Work....................................1-10
Window Lockout.............................................2-16
Windows.......................................................2-14
Power........................................................2-15
Windshield Washer Fluid Level Check................6-11
Windshield Washer.........................................3-10
Fluid..........................................................5-37
Windshield Wiper............................................5-52
Blade Replacement......................................5-52
Fuses........................................................5-89
Windshield Wipers............................................ 3-9
Winter Driving................................................4-39
Wiper Blade Check.........................................6-12
Y
Your Vehicle and the Environment....................... 6-2
16