2004 GMC ENVOY four wheel drive

Jump Starting
If your battery has run down, you may want to use
another vehicle and some jumper cables to start your
vehicle. But please use the following steps to do it
safely.
{CAUTION:
Batteries can hurt you. They can be dangerous
because:
They contain acid that can burn you.
They contain gas that can explode or
ignite.
They contain enough electricity to
burn you.
If you do not follow these steps exactly, some
or all of these things can hurt you.
Notice:Ignoring these steps could result in costly
damage to your vehicle that would not be covered
by your warranty.
Trying to start your vehicle by pushing or pulling it
will not work, and it could damage your vehicle.1. Check the other vehicle. It must have a 12-volt
battery with a negative ground system.
Notice:If the other vehicle’s system is not a 12-volt
system with a negative ground, both vehicles can
be damaged. Only use vehicles with 12-volt systems
with negative grounds to jump start your vehicle.
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles aren’t touching
each other. If they are, it could cause a ground
connection you don’t want. You wouldn’t be able to
start your vehicle, and the bad grounding could
damage the electrical systems.
To avoid the possibility of the vehicles rolling, set
the parking brake rmly on both vehicles involved in
the jump start procedure. Put an automatic
transmission in PARK (P) or a manual transmission
in NEUTRAL before setting the parking brake.
If you have a four-wheel-drive vehicle, be sure the
transfer case is not in NEUTRAL.
Notice:If you leave your radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered
by your warranty. Always turn off your radio and
other accessories when jump starting your vehicle.
3. Turn off the ignition on both vehicles. Unplug
unnecessary accessories plugged into the cigarette
lighter or accessory power outlets (if equipped).
5-43

Four-Wheel Drive
Transfer Case
When to Check Lubricant
It is not necessary to regularly check uid unless you
suspect there is a leak or you hear an unusual noise.
A uid loss could indicate a problem. Have it inspected
and repaired.
How to Check Lubricant
To get an accurate
reading, the vehicle should
be on a level surface.If the level is below the bottom of the ller plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the ller plug hole.
Use care not to overtighten the plug.
What to Use
To determine what kind of lubricant to use, see
Recommended Fluids and Lubricants on page 6-12.
5-50

Changing a Flat Tire
If a tire goes at, avoid further tire and wheel damage
by driving slowly to a level place. Turn on your
hazard warning ashers.
{CAUTION:
Changing a tire can cause an injury. The
vehicle can slip off the jack and roll over you
or other people. You and they could be badly
injured. Find a level place to change your tire.
To help prevent the vehicle from moving:
1. Set the parking brake rmly.
2. Put the shift lever in PARK (P).
3. If you have a four-wheel-drive vehicle, be
sure the transfer case is in a drive
gear – not in NEUTRAL.
4. Turn off the engine.
5. Put the wheel blocks at the front and rear
of the tire farthest away from the one
being changed. That would be the tire on
the other side of the vehicle, at the
opposite end.The following steps will tell you how to use the jack and
change a tire.
5-76

Fuses Usage
24 Unlock
25 Blank
26 Blank
27 OH Battery/OnStar
®System
29 Rainsense™ Wipers
30 Parking Lamps
31 Truck Body Controller Accessory
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Blank
36Heat Ventilation Air Conditioning
B
37 Front Parking Lamps
38 Left Turn Signal
39Heat Ventilation Air
Conditioning 1
Fuses Usage
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
5-111

Fuses Usage
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
36Heat Ventilation Air Conditioning
B
37 Front Parking Lamps
38 Left Turn Signal
39Heat Ventilation Air Conditioning
1
Fuses Usage
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
5-114

Using Your Maintenance Schedule
We at General Motors want to help you keep your vehicle
in good working condition. But we do not know exactly
how you will drive it. You may drive very short distances
only a few times a week. Or you may drive long distances
all the time in very hot, dusty weather. You may use your
vehicle in making deliveries. Or you may drive it to work,
to do errands or in many other ways.
Because of all the different ways people use their
vehicles, maintenance needs vary. You may need more
frequent checks and replacements. So please read
the following and note how you drive. If you have any
questions on how to keep your vehicle in good condition,
see your GM Goodwrench dealer.
This schedule is for vehicles that:
carry passengers and cargo within recommended
limits. You will nd these limits on the tire and
loading information label. SeeLoading Your Vehicle
on page 4-48.
are driven on reasonable road surfaces within legal
driving limits.
are driven off-road in the recommended manner.
SeeOff-Road Driving with Your Four-Wheel-Drive
Vehicle on page 4-15.
use the recommended fuel. SeeGasoline Octane
on page 5-4.The services inScheduled Maintenance on page 6-4
should be performed when indicated. SeeAdditional
Required Services on page 6-6andMaintenance
Footnotes on page 6-7for further information.
{CAUTION:
Performing maintenance work on a vehicle can
be dangerous. In trying to do some jobs, you
can be seriously injured. Do your own
maintenance work only if you have the required
know-how and the proper tools and equipment
for the job. If you have any doubt, see your
GM Goodwrench dealer to have a qualied
technician do the work.
Some maintenance services can be complex.
So, unless you are technically qualied and have the
necessary equipment, you should have your
GM Goodwrench dealer do these jobs.
When you go to your GM Goodwrench dealer for your
service needs, you will know that GM-trained and
supported service technicians will perform the work
using genuine GM parts.
If you want to get service information, seeService
Publications Ordering Information on page 7-12.
6-3

Engine (cont.)
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-39
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-34
Fan Noise..................................................5-36
Oil .............................................................5-16
Overheating................................................5-28
Reduced Power Light...................................3-46
Starting......................................................2-21
Engine Compartment Fuse Block.....................5-102
ENGINE COOLANT HOT/ENGINE
OVERHEATED............................................3-60
Engine Oil Additives........................................5-19
Entertainment System
Cleaning the Video Screen..........................3-119
DVD Distortion..........................................3-117
Entry Lighting.................................................3-18
Environmental Concerns..................................4-17
Erasing HomeLink
®Buttons..............................2-44
Event Data Records (EDR)..............................7-10
Exit Lighting...................................................3-18
Express–Down Window....................................2-16
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-15
F
Filter
Engine Air Cleaner......................................5-21
Finding a Program Type (PTY)
Station (RDS and XM™)..............3-68, 3-79, 3-93
Finding a Station............................3-66, 3-77, 3-91
Finish Care....................................................5-95
Finish Damage...............................................5-97
Fixed Mast Antenna.......................................3-120
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-37
Windshield Washer......................................5-38
FM Stereo....................................................3-117
Fog Lamps....................................................3-17
Following Distance..........................................4-62
Four-Wheel Drive....................................2-26, 5-50
Front Axle......................................................5-51
Front Storage Area.........................................2-46
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
6

Leaving Your Vehicle.......................................2-13
Leaving Your Vehicle With the Engine Running . . . 2-32
LEFT REAR DOOR AJAR................................3-62
Liftgate Release..............................................2-14
Liftgate/Liftglass..............................................2-14
Liftglass/Liftgate..............................................2-14
Light
Air Bag Readiness.......................................3-35
Anti-Lock Brake System Warning...................3-39
Brake System Warning.................................3-38
Change Engine Oil......................................3-45
Charging System.........................................3-36
Check Gages Warning.................................3-47
Cruise Control.............................................3-46
Gate Ajar...................................................3-48
Low Fuel Warning.......................................3-49
Malfunction Indicator....................................3-40
Reduced Engine Power................................3-46
Safety Belt Reminder...................................3-35
Security.....................................................3-45
Service Four-Wheel-Drive Warning Light.........3-47
Lighted Visor Vanity Mirror...............................2-17
Listening to a DVD................................3-89, 3-103
Loading Your Vehicle.......................................4-48
Loading Your Vehicle for Off-Road Driving..........4-16
Locking Rear Axle...........................................4-10
Lockout Protection..........................................2-13Locks
Delayed Locking........................................... 2-9
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...............................................4-13
Low Fuel Warning Light...................................3-49
Luggage Carrier..............................................2-47
Lumbar
Power Controls............................................. 1-2
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-9
At Least Once a Month.................................. 6-9
At Least Once a Year..................................6-10
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-16
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-14
9