2003 GMC ENVOY light

Power Windows and Other Power
Options
Circuit breakers protect the power windows and other
power accessories. When the current load is too heavy,
the circuit breaker opens and closes, protecting the
circuit until the problem is ®xed or goes away.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of ®res
caused by electrical problems.Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical
size and rating.
If you ever have a problem on the road and don't have
a spare fuse, you can borrow one that has the same
amperage. Just pick some feature of your vehicle
that you can get along without Ð like the radio or
cigarette lighterÐ and use its fuse, if it is the correct
amperage. Replace it as soon as you can.
5-90

Fuses Usage
1Electrically-Controlled Air
Suspension
2Passenger's Side High-Beam
Headlamp
3Passenger's Side Low-Beam
Headlamp
4 Back-Up-Trailer Lamps
5 Driver's Side High-Beam Headlamp
6 Driver's Side Low-Beam Headlamp
7 Wash
8 Automatic Transfer Case
9 Windshield Wipers
10 Powertrain Control Module B
11 Fog Lamps
12 Stop Lamp
13 Cigarette Lighter
14 Ignition Coils
15 Air Suspension Ride
16 TBD-Ignition 1Fuses Usage
17 Crank
18 Air Bag
19 Electric Brake
20 Cooling Fan
21 Horn
22 Ignition E
23 Electronic Throttle Control
24Instrument Panel Cluster, Driver
Information Center
25 Automatic Shift Lock Control System
26 Engine 1
27 Back-Up
28 Powertrain Control Module 1
29 Oxygen Sensor
30 Air Conditioning
31 Truck Body Controller
32 Trailer
33 Anti-Lock Brakes (ABS)
5-93

Fuses Usage
1Electrically-Controlled Air
Suspension
2Passenger's Side High-Beam
Headlamp
3Passenger's Side Low-Beam
Headlamp
4 Back-Up-Trailer Lamps
5 Driver's Side High-Beam Headlamp
6 Driver's Side Low-Beam Headlamp
7 Wash
8 Automatic Transfer Case
9 Windshield Wipers
10 Powertrain Control Module B
11 Fog Lamps
12 Stop Lamp
13 Cigarette Lighter
14 Ignition Coils
15 Cannister Vent
16 TBD-Ignition 1
17 Crank
18 Air Bag
19 Electric Brake
20 Cooling Fan
21 HornFuses Usage
22 Ignition E
23 Electronic Throttle Control
24Instrument Panel Cluster, Driver
Information Center
25 Automatic Shift Lock Control System
26 Engine 1
27 Back-Up
28 Powertrain Control Module 1
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 A
54 Oxygen Sensor Bank B
55 Injector Bank A
56 Injector Bank B
Relays Usage
37 Headlamp Washer
5-96

Scheduled Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at 150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles (240 000 km) for the life of this
vehicle.
See
Part B: Owner Checks and Services on page 6-11andPart C: Periodic MaintenanceInspections on
page 6-16.
Footnotes
²The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-17.
Engine Oil Scheduled Maintenance
Change engine oil and ®lter as indicated by the GM
Oil Life System (or every 12 months, whichever
occurs ®rst). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil and ®lter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE ENGINE OIL light will come on.
Change your oil as soon as possible within the next
two times you stop for fuel. It is possible that, if you are
driving under the best conditions, the oil life system
may not indicate that an oil change is necessary for over
a year. However, your engine oil and ®lter must be
changed at least once a year and at this time the system
must be reset. Your dealer has GM-trained service
people who will perform this work using genuine GM
parts and reset the system.
It is also important to check your oil regularly and keep
it at the proper level.
6-5

At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages
are working properly. Look for any other loose or
damaged safety belt system parts. If you see anything
that might keep a safety belt system from doing its
job, have it repaired. Have any torn or frayed safety belts
replaced.
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 5-83.
Spare Tire Check
At least twice a year, after the monthly in¯ation check of
the spare tire determines that the spare is in¯ated to
the correct tire in¯ation 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. See
Changing a Flat
Tire on page 5-64.
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. See
Part D: Recommended Fluids and
Lubricants on page 6-18.
Automatic Transmission Check
Check the transmission ¯uid level; add if needed. SeeAutomatic Transmission Fluid on page 5-21. A ¯uid loss
may indicate a problem. Check the system and repair
if needed.
6-12

Trip Routing:Custom-made, computerized highlighted
maps using the most direct or scenic route are provided
free of charge. Maps include points of interest and a
list of GMC dealers along the route. Also included is a
list of hotels along the route that are discounted
through affiliation with ªQuest International.º Trip Routing
is available through Roadside Assistance by calling
1-800-GMC-8782 (462-8782). Please be prepared to
provide your Vehicle Identi®cation Number (VIN). Allow
®ve working days for ful®llment.
Trip Interruption Assistance:GMC will reimburse any
reasonable trip interruption expenses (up to $500.00)
when directly associated with warranty disablement. Trip
interruption service covers expenses such as meals
and overnight lodging if vehicle disablement occurs at
least 150 miles (240 km) from your home or rental
property. You will be required to obtain prior approval
from GMC Roadside Assistance and pay for expenses
at the time of disablement. Original receipts should
be submitted to GMC Roadside Assistance for
reimbursement. A service representative will provide
assistance when you call.
The Roadside Assistance services listed are available to
retail lease customers operating 2003 GMC light duty
trucks for a period of 3 years/36,000 miles (60,000 km).
All services must be pre-arranged by GMC Roadside
Assistance.Over-the-phone assistance, such as providing the name
of the closest dealer or minor technical advice, etc.,
is available to all owner/operators of GMC trucks,
regardless of vehicle or mileage.
Just dial GMC Roadside Assistance at 1-800-GMC-8782
(1-800-462-8782, Roadside Assistance prompt) to
reach a quali®ed representative who can assist you.
Text telephone (TTY) users, call 1-888-889-2438.
Your Roadside Assistance representative will ask for the
following information when your call is received:·Vehicle Identi®cation Number (VIN)
·Name and home address
·Telephone number and location from which you are
calling
·Location, license plate number and color of your
GMC truck
·Mileage of vehicle and description of problem
Roadside Assistance is available 24 hours a day, 7 days
a week, 365 days a year, including weekends and
holidays. Should you have any questions about roadside
assistance, call the GMC Roadside Assistance Center
or contact your dealer.
Roadside Assistance is not part of or included in the
coverage provided by the New Vehicle Limited Warranty.
GMC reserves the right to make any changes or
discontinue the Roadside Assistance program at
anytime without noti®cation.
7-6

A
Accessory In¯ator...........................................5-62
Accessory Power Outlets.................................3-19
Adding a Snow Plow or Similar Equipment.........4-50
Adding Washer Fluid.......................................5-37
Additional Program Information........................... 7-8
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-89
Adjusting the Speakers
(Balance/Fade)............................3-66, 3-74, 3-83
After Off-Road Driving.....................................4-28
Air Bag Systems.............................................1-51
How Does an Air Bag Restrain?....................1-58
Servicing Your Air Bag-Equipped Vehicle.........1-60
What Makes an Air Bag In¯ate?....................1-57
What Will You See After an
Air Bag In¯ates?......................................1-58
When Should an Air Bag In¯ate?...................1-56
Where Are the Air Bags?..............................1-54
Air Bag .........................................................3-37
Readiness Light..........................................3-37
Air Cleaner/Filter, Engine.................................5-20
All Overseas Locations...................................... 7-4
AM .............................................................3-105
Antenna, Fixed Mast......................................3-107
Anti-Lock Brake, System Warning Light..............3-41
Anti-lock Brake System..................................... 4-6
Appearance Care............................................5-80
Care of Safety Belts....................................5-83Appearance Care (cont.)
Chemical Paint Spotting...............................5-86
Cleaning the Inside of Your Vehicle................5-80
Cleaning the Outside of Your Vehicle..............5-83
Finish Damage............................................5-86
Sheet Metal Damage...................................5-85
Underbody Maintenance...............................5-86
Vehicle Care/Appearance Materials................5-86
Weatherstrips..............................................5-83
Approaching a Hill..........................................4-20
Ashtrays........................................................3-20
Audio Speakers..............................................3-94
Audio System(s).............................................3-63
Audio Steering Wheel Controls....................3-105
Care of Your Cassette Tape Player...............3-106
Care of Your CD and DVD Player................3-107
Care of Your CDs and DVDs.......................3-107
Chime Level Adjustment.............................3-107
Fixed Mast Antenna...................................3-107
Audio Systems..............................................3-104
Radio Personalization.................................3-104
Audio System(s).............................................3-71
Radio with Cassette and CD.........................3-71
Radio with CD............................................3-64
Radio with Six-Disc CD................................3-81
Rear Seat Audio (RSA)...............................3-103
Setting the Time..........................................3-63
Theft-Deterrent Feature...............................3-104
Understanding Radio Reception...................3-105
Automatic Headlamp System............................3-15
1

Automatic Transfer Case..................................2-25
Automatic Transmission Check..........................6-12
Automatic Transmission Shift Lock Control
System Check.............................................6-14
Automatic Transmission...................................5-21
Fluid..........................................................5-21
Operation...................................................2-23
B
Backglass Wiper Blade Replacement.................5-54
Backing Up....................................................4-57
BATTERY NOT CHARGING.............................3-60
Battery Replacement......................................... 2-7
Battery Run-Down Protection............................3-19
Battery..........................................................5-41
Before Leaving on a Long Trip.........................4-35
Before You Drive............................................3-92
Before You Go Off-Roading..............................4-15
Body Lubrication Service..................................6-13
Brake Adjustment............................................5-40
Brake Fluid....................................................5-38
Brake Pedal Travel.........................................5-40
Brake Wear...................................................5-40
Brake............................................................2-28
Parking......................................................2-28
System Inspection.......................................6-17
System Warning Light..................................3-39
Brakes..........................................................5-38Braking in Emergencies..................................... 4-8
Braking........................................................... 4-5
Break-In, New Vehicle.....................................2-19
Bulb Replacement...........................................5-50
Front Turn Signal and Sidemarker Lamps.......5-51
Halogen Bulbs............................................5-50
Headlamps.................................................5-50
Replacement Bulbs......................................5-52
Taillamps and Turn Signal Lamps..................5-51
Buying New Tires...........................................5-58
C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Speci®cations..........................5-102
Carbon Monoxide...................4-39, 4-50, 2-13, 2-33
Care of.........................................................5-83
Safety Belts................................................5-83
Your Cassette Tape Player..........................3-106
Your CD and DVD Player...........................3-107
Your CDs and DVDs..................................3-107
Cargo Cover..................................................2-50
Cargo Tie Downs............................................2-50
Cassette Tape Messages.................................3-78
Cassette Tape Player Service...........................6-11
Chains, Tires..................................................5-62
2