ECU GMC ENVOY DENALI 2005 Workshop Manual

How to Check
Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your tires are properly inated
simply by looking at them. Radial tires may look properly
inated even when they’re underinated. Check the tire’s
ination pressure when the tires are cold. Cold means
your vehicle has been sitting for at least three hours or
driven no more than 1 mile (1.6 km).
Remove the valve cap from the tire valve stem. Press
the tire gage rmly onto the valve to get a pressure
measurement. If the cold tire ination pressure matches
the recommended pressure on the tire and loading
information label, no further adjustment is necessary.
If the pressure is low, add air until you reach the
recommended amount.
If you overll the tire, release air by pushing on the
metal stem in the center of the tire valve. Recheck the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and moisture.
Tire Inspection and Rotation
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km).
Any time you notice unusual wear, rotate your tires as
soon as possible and check wheel alignment. Also
check for damaged tires or wheels. SeeWhen It Is Time
for New Tires on page 5-64andWheel Replacement
on page 5-67for more information.
Make sure the spare tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If it moves,
use the wheel wrench to tighten the cable. For
information on storing or removing the spare tire, see
Changing a Flat Tire on page 5-71.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The rst rotation
is the most important. SeeScheduled Maintenance
on page 6-4.
5-62

{CAUTION:
The underbody-mounted spare tire needs to be
stored with the valve stem pointing up. If the
spare tire is stored with the valve stem
pointing downward, its secondary latch won’t
work properly and the spare tire could loosen
and suddenly fall from your vehicle. If this
happened when your vehicle was being driven,
the tire might contact a person or another
vehicle, causing injury and, of course, damage
to itself as well. Be sure the
underbody-mounted spare tire is stored with
its valve stem pointing up.
Notice:An aluminum wheel with a at tire should
always be stored under the vehicle with the
hoist. However, storing it that way for an extended
period could damage the wheel. To avoid this,
always stow the wheel properly with the valve stem
pointing up and have the wheel repaired as soon
as possible.Follow this diagram to store the underbody-mounted
spare.
A. Wheel Wrench
B. Hoist Shaft
C. Extension(s)
D. Retainer
E. Spare or Flat Tire
(Valve Stem
Pointed Up)
1. Put the tire on the ground at the rear of the vehicle,
with the valve stem pointed up and to the rear.
2. Pull the retainer (D) through the wheel.
3. Put the socket end of the extension (C), on an
45 degree angle downward, through the hole in
the rear bumper and into the hoist shaft (B).
4. Raise the tire fully against the underside of the
vehicle. Continue turning the wheel wrench (A)
clockwise until you hear two clicks or feel it
skip twice. This indicates that the tire is secure and
the cable is tight. The spare tire hoist cannot be
overtightened.
5-83

5. Make sure the tire is stored securely. Push, pull (A),
and then try to turn (B) the tire. If the tire moves,
use the wheel wrench and socket end of the
extension to tighten the cable.
6. Return the jack, wheel blocks and tools to the
proper location in the vehicle as shown next.
Roll up the instruction label and return it to the
slot in the tool kit.A. Handle
B. Wheel Wrench
C. Instruction LabelD. Extension(s)
E. Wheel Blocks
and Jack
Envoy
5-84

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 6-12.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-16for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. SeeEngine
Coolant on page 5-25for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank and add the proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inated to the correct pressures. Do not forget to check
your spare tire. SeeTires on page 5-54for further
details. Check to make sure the spare tire is stored
securely. Push, pull and then try to turn the spare tire.
If it moves, tighten it. SeeChanging a Flat Tire on
page 5-71.
6-9

Flat Tire Change:Installation of a spare tire will be
covered at no charge. The customer is responsible
for the repair or replacement of the tire if not
covered by a warrantable failure.
Jump Start:No-start occurrences which require a
battery jump start will be covered at no charge.
Dealer Locator Service
Trip Routing:Your Roadside Assistance
Representative can provide you with specic
information regarding this feature.
Trip Interruption Expense Benets:Your
Roadside Assistance Representative can provide
you with specic information regarding this feature.
In many instances, mechanical failures are covered
under GMC’s Bumper-to-Bumper warranty. However,
when other services are utilized, our Roadside
Assistance Representatives will explain any payment
obligations you might incur.
For prompt and efficient assistance when calling, please
provide the following to the Roadside Assistance
Representative:
Your name, home address, and home
telephone number.
Telephone number of your location.
Location of the vehicle.
Model, year, color, and license plate number of
the vehicle.
Mileage, Vehicle Identication Number (VIN) and
delivery date of the vehicle.
Description of the problem.
While we hope you never have the occasion to use our
service, it is added security while traveling for you
and your family. Remember, we are only a phone call
away. GMC Roadside Assistance: 1-800-462-8782, text
telephone (TTY) users, call 1-888-889-2438.
GMC reserves the right to limit services or
reimbursement to an owner or driver when, in GMC’s
judgement, the claims become excessive in frequency or
type of occurrence.
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 any
time without notication.
7-7

Check
Engine Light...............................................3-42
Gages Warning Light...................................3-49
Check Gas Cap Light......................................3-51
Checking Things Under the Hood......................5-10
Chemical Paint Spotting...................................5-93
Child Restraints
Child Restraint Systems...............................1-32
Infants and Young Children...........................1-29
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-38
Older Children.............................................1-26
Securing a Child Restraint Designed for the
LATCH System........................................1-40
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-41
Securing a Child Restraint in the Center Seat
Position..................................................1-43
Securing a Child Restraint in the Right Front
Seat Position...........................................1-43
Top Strap...................................................1-35
Top Strap Anchor Location............................1-37
Where to Put the Restraint...........................1-34
Chime Level Adjustment.................................3-139
Cigarette Lighter.............................................3-20Cleaning
Aluminum Wheels........................................5-91
Exterior Lamps/Lenses.................................5-90
Fabric/Carpet..............................................5-86
Finish Care.................................................5-90
Glass Surfaces............................................5-88
Instrument Panel.........................................5-88
Interior Plastic Components...........................5-88
Leather......................................................5-88
Tires..........................................................5-92
Underbody Maintenance...............................5-93
Vinyl..........................................................5-88
Washing Your Vehicle...................................5-89
Weatherstrips..............................................5-89
Windshield, Backglass, and Wiper Blades.......5-91
Climate Control System
Climate Controls Personalization....................3-31
Dual..........................................................3-21
Dual Automatic............................................3-23
Outlet Adjustment........................................3-28
Rear..........................................................3-28
Comfort Guides, Rear Safety Belt.....................1-23
Content Theft-Deterrent....................................2-16
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-58
3

Coolant
Engine Temperature Gage............................3-41
Heater, Engine............................................2-21
Cooling System..............................................5-30
Cruise Control Lever.......................................3-11
Cruise Control Light........................................3-47
Customer Assistance Information
Courtesy Transportation.................................. 7-8
Customer Assistance for Text Telephone (TTY)
Users....................................................... 7-4
Customer Assistance Offices........................... 7-5
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-6
Reporting Safety Defects to General Motors....7-13
Reporting Safety Defects to the Canadian
Government............................................7-12
Reporting Safety Defects to the United States
Government............................................7-12
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-13
D
Daytime Running Lamps..................................3-16
Defensive Driving............................................. 4-2
Delayed Locking............................................... 2-9
Displacement on Demand (DoD).......................2-23Doing Your Own Service Work........................... 5-4
Dome Lamp Override......................................3-18
Dome Lamps.................................................3-18
Door
Delayed Locking........................................... 2-9
Locks.......................................................... 2-8
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-12
Driver
Position, Safety Belt.....................................1-14
Driver Information Center (DIC).........................3-51
DIC Operation and Displays..........................3-52
DIC Vehicle Customization............................3-59
DIC Warnings and Messages........................3-55
Driving
At Night.....................................................4-30
City...........................................................4-34
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-35
Hill and Mountain Roads..............................4-37
In Rain and on Wet Roads...........................4-31
Rocking Your Vehicle to Get it Out.................4-44
Winter........................................................4-39
Dual Automatic Climate Control System.............3-23
Dual Climate Control System............................3-21
DVD
Rear Seat Entertainment System..................3-121
4

I
Ignition Positions.............................................2-19
Infants and Young Children, Restraints...............1-29
Ination -- Tire Pressure..................................5-61
Instrument Panel
Brightness..................................................3-18
Cluster.......................................................3-33
Overview..................................................... 3-4
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Labelling, Tire Sidewall....................................5-55
Lamps
Battery Run-Down Protection.........................3-19
Dome........................................................3-18
Dome Lamp Override...................................3-18
Fog ...........................................................3-17
Reading.....................................................3-19LATCH System
Child Restraints...........................................1-38
Securing a Child Restraint Designed for
the LATCH System...................................1-40
Liftgate/Liftglass..............................................2-13
Liftglass/Liftgate..............................................2-13
Light
Airbag Readiness........................................3-36
Anti-Lock Brake System Warning...................3-41
Brake System Warning.................................3-40
Change Engine Oil......................................3-46
Charging System.........................................3-38
Check Gages Warning.................................3-49
Check Gas Cap..........................................3-51
Cruise Control.............................................3-47
Gate Ajar...................................................3-49
Highbeam On.............................................3-48
Low Fuel Warning.......................................3-51
Malfunction Indicator....................................3-42
Passenger Airbag Status Indicator..................3-37
Reduced Engine Power................................3-47
Safety Belt Reminder...................................3-35
Security.....................................................3-46
Service Four-Wheel-Drive Warning Light.........3-48
Lighting
Entry.........................................................3-19
Exit...........................................................3-19
Locking Rear Axle...........................................4-11
Lockout Protection..........................................2-12
7

Locks
Delayed Locking........................................... 2-9
Door........................................................... 2-8
Lockout Protection.......................................2-12
Programmable Automatic Door Locks............... 2-9
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-15
Low Fuel Warning Light...................................3-51
Luggage Carrier..............................................2-55
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....................................6-15
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-14
Owner Checks and Services........................... 6-9Maintenance Schedule (cont.)
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-2
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-42
Memory Seat.................................................2-60
Message
DIC Warnings and Messages........................3-55
Mirrors
Manual Rearview Mirror................................2-36
Manual Rearview Mirror with Compass...........2-36
Manual Rearview Mirror with Compass
and Temperature..............................2-41, 3-35
Manual Rearview Mirror with OnStar®.............2-36
Manual Rearview Mirror with OnStar®
and Compass..........................................2-39
Manual Rearview Mirror with OnStar®,
Compass, and Temperature Display............2-43
Outside Convex Mirror.................................2-47
Outside Curb View Assist Mirror....................2-46
Outside Heated Mirrors................................2-47
Outside Manual Mirrors................................2-45
Outside Power Mirrors..................................2-46
MyGMLink.com................................................ 7-4
8

Q
Questions and Answers About Safety Belts.........1-13
R
Radiator Pressure Cap....................................5-28
Radios..........................................................3-65
Care of Your Cassette Tape Player...............3-137
Care of Your CD and DVD Player................3-139
Care of Your CDs and DVDs.......................3-138
Navigation/Radio System.............................3-134
Radio with Cassette and CD.........................3-93
Radio with CD....................................3-66, 3-77
Radio with Six-Disc CD..............................3-107
Rear Seat Audio........................................3-134
Setting the Time..........................................3-65
Theft-Deterrent..........................................3-135
Understanding Reception............................3-137
Rainsense™ Wipers.......................................... 3-9
Reading Lamps..............................................3-19
Rear Axle......................................................5-47
Locking......................................................4-11
Rear Climate Control System............................3-28
Rear Compartment Storage Panel/Cover............2-56
Rear Door Security Locks................................2-12
Rear Floor Storage Lid....................................2-58
Rear Safety Belt Comfort Guides......................1-23Rear Seat Audio (RSA)..................................3-134
Rear Seat Entertainment System.....................3-121
Rear Seat Operation......................................... 1-5
Rear Seat Passengers, Safety Belts..................1-21
Rearview Mirror with Compass..........................2-36
Rearview Mirror with Compass and Temperature........
2-41, 3-35
Rearview Mirror with OnStar®...........................2-36
Rearview Mirror with OnStar®and Compass.......2-39
Rearview Mirror with OnStar®, Compass, and
Temperature Display....................................2-43
Rearview Mirrors.............................................2-36
Reclining Seatbacks.......................................... 1-3
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-51
Reduced Engine Power Light............................3-47
Remote Keyless Entry System............................ 2-5
Remote Keyless Entry System, Operation............ 2-6
Removing the Flat Tire and Installing the
Spare Tire..................................................5-75
Removing the Spare Tire and Tools...................5-72
Replacement Bulbs.........................................5-51
Reporting Safety Defects
Canadian Government..................................7-12
General Motors...........................................7-13
United States Government............................7-12
Restraint System Check
Checking Your Restraint Systems...................1-64
10