2004 GMC ENVOY XL trailer

Fuses Usage
30 Air Conditioning
31 Truck Body Controller 1
32 Trailer
33 Anti-Lock Brakes (ABS)
34 Ignition A
35 Blower Motor
36 Ignition B
50 Passenger’s Side Trailer Turn
51 Driver’s Side Trailer Turn
52 Hazard Flashers
53 Oxygen Sensor Bank B
54 Oxygen Sensor Bank A
55 Injector Bank A
56 Injector Bank B
57 Electric Adjustable PedalRelays Usage
37 Headlamp Washer
38 Rear Window Washer
39 Fog Lamps
40 Horn
41 Fuel Pump
42 Windshield Washer
43 High-Beam Headlamp
44 Air Conditioning
45 Cooling Fan
46 Headlamp Driver Module
47 Starter
49 Electric Adjustable Pedal
58 Ignition 1
Miscellaneous Usage
48 Instrument Panel Battery
5-103

Fuses Usage
35 Blank
36Heat Ventilation
Air Conditioning B
37 Front Parking Lamps
38 Left Turn Signal
39Heat Ventilation
Air Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44Heat Ventilation
Air Conditioning
45 Rear Fog Lamps
46 Auxiliary Power 1
47 Ignition 0Fuses Usage
48 Four-Wheel Drive
49 Blank
50 Truck Body Controller Ignition
51 Brakes
52 Truck Body Controller Run
Envoy XL
5-106

Fuses Usage
18 Locks
19Liftgate Module/Driver Seat
Module
20 Vent Window
21 Lock
22 Retained Accessory Power
23 Blank
24 Unlock
25 Blank
26 Blank
27 OH Battery/OnStar
®System
28 Sunroof
29 Rainsense™ Wipers
30 Parking Lamps
31 Truck Body Controller Accessory
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Blank
Fuses Usage
36Heat Ventilation
Air Conditioning B
37 Front Parking Lamps
38 Left Turn Signal
39Heat Ventilation
Air Conditioning 1
40 Truck Body Controller 4
41 Radio
42 Trailer Park
43 Right Turn Signal
44Heat 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
5-108

(h)Change automatic transmission uid and lter 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.
(i)Drain, ush and rell cooling system. See Engine
Coolant on page 5-24for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and ller neck.
Pressure test the cooling system and pressure cap.
(j)A uid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the uid level checked. Add uid if needed.Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-13.
6-9

Driving (cont.)
Hill and Mountain Roads..............................4-38
In Rain and on Wet Roads...........................4-31
Winter........................................................4-40
Driving Across an Incline..................................4-26
Driving Downhill..............................................4-24
Driving in Mud, Sand, Snow or Ice....................4-28
Driving in Water..............................................4-28
Driving On Grades..........................................4-63
Driving on Off-Road Hills.................................4-21
Driving on Snow or Ice....................................4-41
Driving Through Deep Standing Water...............4-33
Driving Through Flowing Water.........................4-33
Driving Uphill..................................................4-22
Driving with a Trailer.......................................4-61
Dual Automatic Climate Control System.............3-25
Dual Climate Control System............................3-22
DVD
Rear Seat Entertainment System..................3-106
DVD Distortion..............................................3-117
DVD Messages.............................................3-117
DVD Player..................................................3-110
E
Electrical System
Add-On Equipment......................................5-96
Fuses and Circuit Breakers...........................5-97
Headlamps.................................................5-96Electrical System (cont.)
Power Windows and Other Power Options......5-96
Windshield Wiper Fuses...............................5-96
Electronically Controlled Air Suspension
System......................................................4-54
Emergency Release for Opening Liftgate............2-14
Emissions Inspection and Maintenance
Programs...................................................3-45
Engine
Air Cleaner/Filter.........................................5-21
Battery.......................................................5-42
Change Engine Oil Light...............................3-47
Check and Service Engine Soon Light............3-43
Coolant......................................................5-24
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-42
Drive Belt Routing.......................................6-16
Engine Compartment Overview......................5-12
Exhaust.....................................................2-34
Fan Noise..................................................5-36
Oil .............................................................5-16
Overheating................................................5-28
Reduced Power Light...................................3-48
Starting......................................................2-21
Engine Compartment Fuse Block......................5-97
ENGINE COOLANT HOT/ENGINE
OVERHEATED............................................3-61
Engine Oil Additives........................................5-19
Entry Lighting.................................................3-19
Environmental Concerns..................................4-18
5

Gasoline
Octane........................................................ 5-4
Specications............................................... 5-5
Gate Ajar Light...............................................3-49
Gate Operator and Canadian Programming........2-45
Getting Familiar with Off-Road Driving................4-19
Glove Box.....................................................2-46
GM Mobility Program for Persons
with Disabilities............................................. 7-6
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-5
Headlamp High/Low-Beam Changer.................... 3-9
Headlamp Washer..........................................3-12
Headlamps....................................................5-51
Bulb Replacement.......................................5-51
Electrical System.........................................5-96
Front Turn Signal and Sidemarker Lamps.......5-51
Halogen Bulbs............................................5-51
Headphones.................................................3-107
Heated Seats................................................... 1-3
Highway Hypnosis...........................................4-37
Hill and Mountain Roads..................................4-38
Hitches..........................................................4-59
HomeLink
®Transmitter....................................2-42HomeLink
®Transmitter, Programming................2-43
Hood
Checking Things Under................................5-10
Release.....................................................5-10
Horn............................................................... 3-7
How to Add Coolant to the Coolant
Recovery Tank............................................5-32
How to Add Coolant to the Radiator..................5-34
How to Add Fluid............................................5-24
How to Check Lubricant...................................5-48
How to Check Power Steering Fluid..................5-37
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-14
Hydroplaning..................................................4-32
I
ICE POSSIBLE..............................................3-62
If No Steam Is Coming From Your Engine..........5-29
If Steam Is Coming From Your Engine...............5-28
If the Light Is Flashing.....................................3-44
If the Light Is On Steady.................................3-44
If You Are Caught in a Blizzard.........................4-42
If You Are Stuck in Sand, Mud, Ice or Snow.......4-44
If You Do Decide To Pull A Trailer.....................4-56
Ignition Positions.............................................2-20
Infants and Young Children, Restraints...............1-29
7

Locks
Delayed Locking..........................................2-10
Door........................................................... 2-8
Leaving Your Vehicle....................................2-13
Lockout Protection.......................................2-13
Power Door.................................................. 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-13
Loss of Control...............................................4-14
Low Fuel Warning Light...................................3-50
Luggage Carrier..............................................2-48
Lumbar
Power Controls............................................. 1-2
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill.........................................6-10
At Least Once a Month................................6-10
At Least Once a Year..................................6-11
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-8
Maintenance Record....................................6-16
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-15
Owner Checks and Services........................... 6-9
Recommended Fluids and Lubricants.............6-13
Scheduled Maintenance................................. 6-4Maintenance Schedule (cont.)
Using Your................................................... 6-3
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-65
Making Turns.................................................4-62
Malfunction Indicator Light................................3-43
Matching Transmitter(s) to Your Vehicle............... 2-6
Memory Seat.................................................2-53
Message
DIC Warnings and Messages........................3-60
Mexico, Central America and Caribbean
Islands/Countries (Except Puerto Rico
and U.S. Virgin Islands)................................. 7-5
Mirror Operation.............................................2-36
Mirrors
Automatic Dimming Rearview with
OnStar®and Compass..............................2-36
Outside Convex Mirror.................................2-39
Outside Curb View Assist Mirrors...................2-39
Outside Heated Mirrors................................2-39
Outside Manual Mirrors................................2-38
Outside Power Mirrors..................................2-38
MyGMLink.com................................................ 7-4
N
Navigation/Radio System................................3-106
New Vehicle Break-In......................................2-19
Normal Maintenance Replacement Parts............6-15
9

T
Tachometer....................................................3-37
Taillamps
Turn Signal Lamps......................................5-52
Testing the Alarm............................................2-18
Theft-Deterrent, Radio....................................3-119
Theft-Deterrent Systems...................................2-17
Content Theft-Deterrent................................2-17
Passlock
®...................................................2-19
Throttle, Adjustable..........................................2-22
TIGHTEN FUEL CAP......................................3-63
Tilt Wheel........................................................ 3-7
Tire Sidewall Labeling......................................5-56
Tire Size.......................................................5-59
Tire Terminology and Denitions........................5-61
Tires.............................................................5-55
Buying New Tires........................................5-67
Chains.......................................................5-71
Changing a Flat Tire....................................5-74
If a Tire Goes Flat.......................................5-73
Ination - Tire Pressure................................5-64
Inspection and Rotation................................5-65
Spare Tire..................................................5-87
Uniform Tire Quality Grading.........................5-68
Wheel Alignment and Tire Balance.................5-69
Wheel Replacement.....................................5-69
When It Is Time for New Tires......................5-66
To Use the Engine Coolant Heater....................2-23Top Strap......................................................1-37
Top Strap Anchor Location...............................1-39
Torque Lock...................................................2-32
Total Weight on Your Vehicle’s Tires..................4-59
Towing
Recreational Vehicle.....................................4-45
Towing a Trailer..........................................4-55
Your Vehicle...............................................4-45
Traction
Assist System (TAS)...................................... 4-9
Trailer Brakes.................................................4-60
Trailer Wiring Harness.....................................4-66
Transfer Case................................................5-49
Transmission
Fluid, Automatic...........................................5-22
Transmission Operation, Automatic....................2-24
Transmission, Transaxle, Transfer Case
Unit Repair Manual......................................7-12
Transportation Options...................................... 7-9
Travel Note Recorder......................................2-47
Traveling to Remote Areas...............................4-18
Trip Information..............................................3-51
Trip Odometer................................................3-37
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-61
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-63
Two-Wheel-Drive Vehicles................................4-46
14