check engine light GMC ENVOY DENALI 2008 Owner's Manual

When you go to your dealer/retailer for your service
needs, you will know that trained and supported service
technicians will perform the work using genuine parts.
If you want to purchase service information, seeService
Publications Ordering Information on page 7-16.
Owner Checks and Services on page 6-9tells you what
should be checked, when to check it, and what you can
easily do to help keep your vehicle in good condition.
The proper replacement parts, uids, and lubricants to
use are listed inRecommended Fluids and Lubricants
on page 6-12andMaintenance Replacement Parts
on page 6-14. When your vehicle is serviced, make sure
these are used. All parts should be replaced and all
necessary repairs done before you or anyone else
drives the vehicle. We recommend the use of genuine
parts from your dealer/retailer.
Scheduled Maintenance
When the change engine oil light or CHANGE ENGINE
OIL DIC message comes on, it means that service is
required for your vehicle. SeeChange Engine Oil Light
on page 3-45orDIC Warnings and Messages on
page 3-53. Have your vehicle serviced as soon as
possible within the next 600 miles (1 000 km). It
is possible that, if you are driving under the best
conditions, the engine oil life system may not indicate
that vehicle service 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/retailer has trained service
technicians who will perform this work using genuine
parts and reset the system.
If the engine oil life system is ever reset accidentally, you
must service your vehicle within 3,000 miles (5 000 km)
since your last service. Remember to reset the oil life
system whenever the oil is changed. SeeEngine Oil Life
System on page 5-19for information on the Engine Oil
Life System and resetting the system.
When the change engine oil light or CHANGE ENGINE
OIL DIC message appears, certain services, checks,
and inspections are required. Required services
are described in the following for “MaintenanceI” and
“MaintenanceII.” Generally, it is recommended that your
rst service be MaintenanceI, your second service be
MaintenanceII, and that you alternate MaintenanceI
and MaintenanceIIthereafter. However, in some cases,
MaintenanceIImay be required more often.
MaintenanceI— Use MaintenanceIif the light or
message comes on within 10 months since the vehicle
was purchased or MaintenanceIIwas performed.
MaintenanceII— Use MaintenanceIIif the previous
service performed was MaintenanceI. Always use
MaintenanceIIwhenever the light or message comes
on 10 months or more since the last service or if the light
or message has not come on at all for one year.
6-4

(e)Make sure the safety belt reminder light and safety
belt assemblies 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 see Checking
the Restraint Systems on page 1-68.
(f)Lubricate all key lock cylinders, hood latch assembly,
secondary latch, pivots, spring anchor, release pawl,
rear compartment hinges, outer liftgate handle pivot
points, rear door detent link, roller mechanism, liftgate
handle pivot points, latch bolt, fuel door hinge, cargo
door hinge, locks, and folding seat hardware. More
frequent lubrication may be required when exposed to a
corrosive environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Inspect hoses for cracks, chafing, leaks, kinks, and
proper installation.(h)Change automatic transmission fluid and filter 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, flush, and refill cooling system. This service
can be complex; you should have your dealer/retailer
perform this service. See Engine Coolant on page 5-26
for what to use. Inspect hoses. Clean radiator,
condenser, pressure cap, and filler neck. Pressure test
the cooling system and pressure cap.
(j)A fluid loss in any vehicle system could indicate a
problem. Have the system inspected and repaired and
the fluid level checked. Add fluid if needed.
(k)If you drive regularly under dusty conditions, inspect
the filter at each engine oil change.
(l)Visually inspect belt for fraying, excessive cracks, or
obvious damage. Replace belt if necessary.
6-8

Check
Engine Light...............................................3-41
Gages Warning Light...................................3-47
Check Gas Cap Light......................................3-49
Checking Things Under the Hood......................5-10
Chemical Paint Spotting.................................5-106
Child Restraints
Child Restraint Systems...............................1-38
Infants and Young Children...........................1-35
Lower Anchors and Tethers for Children..........1-41
Older Children.............................................1-32
Securing a Child Restraint in a
Rear Outside Seat Position........................1-47
Securing a Child Restraint in the
Center Rear Seat Position.........................1-49
Securing a Child Restraint in the
Right Front Seat Position..........................1-50
Where to Put the Restraint...........................1-40
Chime Level Adjustment.................................3-103
Cigarette Lighter.............................................3-20
Cleaning
Aluminum Wheels......................................5-105
Exterior Lamps/Lenses................................5-104
Fabric/Carpet............................................5-101
Finish Care...............................................5-104
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-102
Interior.....................................................5-100
Leather....................................................5-102
Tires........................................................5-106Cleaning (cont.)
Underbody Maintenance.............................5-106
Washing Your Vehicle.................................5-103
Weatherstrips............................................5-103
Windshield, Backglass, and Wiper Blades......5-105
Climate Control System
Dual..........................................................3-21
Dual Automatic............................................3-23
Outlet Adjustment........................................3-28
Rear..........................................................3-28
Clock, Setting.................................................3-66
Collision Damage Repair..................................7-12
Compass.......................................2-39, 2-41, 2-44
Content Theft-Deterrent....................................2-16
Control of a Vehicle.......................................... 4-3
Convenience Net............................................2-59
Coolant
Engine Temperature Gage............................3-40
Heater, Engine............................................2-24
Cooling System..............................................5-30
Cruise Control................................................3-11
Cruise Control Light........................................3-46
Customer Assistance Information
Courtesy Transportation................................7-11
Customer Assistance for
Text Telephone (TTY) Users........................ 7-6
Customer Assistance Offices........................... 7-6
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-7
Reporting Safety Defects to General Motors....7-16
3

E
EDR .............................................................7-18
Electrical System
Add-On Equipment.....................................5-109
Engine Compartment Fuse Block.................5-110
Fuses and Circuit Breakers.........................5-110
Headlamps...............................................5-109
Power Windows and Other Power Options....5-109
Rear Underseat Fuse Block.........................5-116
Windshield Wiper Fuses.............................5-109
Electronically Controlled Air Suspension System . . . 4-44
Engine
Air Cleaner/Filter.........................................5-21
Change Engine Oil Light...............................3-45
Check and Service Engine Soon Light............3-41
Coolant......................................................5-26
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-40
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-37
Fan Noise..................................................5-35
Oil .............................................................5-16
Oil Life System...........................................5-19
Overheating................................................5-28
Reduced Power Light...................................3-46
Starting......................................................2-22
Entry Lighting.................................................3-18
Event Data Recorders.....................................7-18Exit Lighting...................................................3-18
Extender, Safety Belt.......................................1-31
F
Filter
Engine Air Cleaner......................................5-21
Finish Damage.............................................5-106
Fixed Mast Antenna.......................................3-103
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-81
Flat Tire, Changing.........................................5-82
Flat Tire, Storing.............................................5-96
Fluid.............................................................5-23
Power Steering...........................................5-36
Windshield Washer......................................5-37
Fog Lamp
Fog ...........................................................3-16
Four-Wheel Drive....................................2-29, 5-47
Front Axle......................................................5-48
Fuel............................................................... 5-5
Additives...................................................... 5-7
California Fuel.............................................. 5-6
Check Gas Cap Light...................................3-49
Filling a Portable Fuel Container....................5-10
Filling the Tank............................................. 5-8
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-48
5

Fuel (cont.)
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Low Warning Light.......................................3-49
Running Out of...........................................2-38
Fuses
Engine Compartment Fuse Block.................5-110
Fuses and Circuit Breakers.........................5-110
Rear Underseat Fuse Block.........................5-116
Windshield Wiper.......................................5-109
G
Gage
Check Gages Warning Light..........................3-47
Engine Coolant Temperature.........................3-40
Fuel..........................................................3-48
Oil Pressure...............................................3-44
Speedometer..............................................3-32
Tachometer.................................................3-32
Voltmeter Gage...........................................3-37
Garage Door Opener.......................................2-52
Gasoline
Octane........................................................ 5-6
Specications............................................... 5-6
Gate Ajar Light...............................................3-48
Glove Box.....................................................2-57
GM Mobility Reimbursement Program.................. 7-7
H
Hazard Warning Flashers................................... 3-6
Head Restraints..............................................1-10
Headlamp
Aiming.......................................................5-49
Headlamps............................................3-14, 5-50
Bulb Replacement.......................................5-49
Daytime Running Lamps...............................3-15
Electrical System.......................................5-109
Flash-to-Pass............................................... 3-8
Front Turn Signal, Sidemarker and
Parking Lamps.........................................5-51
Halogen Bulbs............................................5-49
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-15
Washer......................................................3-11
Heated Seats................................................... 1-4
Heater...........................................................3-21
Heater...........................................................3-23
Highbeam On Light.........................................3-47
High-Speed Operation, Tires.............................5-66
Highway Hypnosis...........................................4-28
Hill and Mountain Roads..................................4-29
Hood
Checking Things Under................................5-10
Release.....................................................5-11
Horn............................................................... 3-6
How to Wear Safety Belts Properly...................1-18
6

I
Ignition Positions.............................................2-21
Infants and Young Children, Restraints...............1-35
Ination - Tire Pressure...................................5-64
Instrument Panel
Overview..................................................... 3-4
Instrument Panel (I/P)
Brightness..................................................3-17
Cluster.......................................................3-31
J
Jump Starting.................................................5-42
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
L
Labeling, Tire Sidewall.....................................5-58
Lamps
Dome........................................................3-17
Dome Lamp Override...................................3-17
Reading.....................................................3-18
Lap-Shoulder Belt...........................................1-26LATCH System
Child Restraints...........................................1-41
License Plate Lamps.......................................5-53
Liftgate/Liftglass..............................................2-12
Liftglass/Liftgate..............................................2-12
Light
Airbag Readiness........................................3-33
Antilock Brake System Warning.....................3-39
Brake System Warning.................................3-38
Change Engine Oil......................................3-45
Charging System.........................................3-36
Check Gages Warning.................................3-47
Check Gas Cap..........................................3-49
Cruise Control.............................................3-46
Gate Ajar...................................................3-48
Highbeam On.............................................3-47
Low Fuel Warning.......................................3-49
Malfunction Indicator....................................3-41
Passenger Airbag Status Indicator..................3-34
Reduced Engine Power................................3-46
Safety Belt Reminders..................................3-32
Security.....................................................3-46
Service Four-Wheel-Drive Warning Light.........3-47
StabiliTrak®Indicator....................................3-40
StabiliTrak®Service......................................3-39
Tire Pressure..............................................3-41
Lighting
Entry.........................................................3-18
Exit...........................................................3-18
7

Mirrors (cont.)
Outside Manual Mirrors................................2-46
Outside Power Mirrors..................................2-47
MP3 .............................................................3-82
MyGMLink.com................................................ 7-5
N
Navigation System, Privacy..............................7-19
Navigation/Radio System,
see Navigation Manual.................................3-87
New Vehicle Break-In......................................2-20
O
Odometer......................................................3-32
Odometer, Trip...............................................3-32
Off-Road Driving.............................................4-13
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-45
Engine.......................................................5-16
Pressure Gage............................................3-44
Oil, Engine Oil Life System..............................5-19
Older Children, Restraints................................1-32
Online Owner Center........................................ 7-5
OnStar, Privacy..............................................7-19
OnStar
®System, see OnStar®Manual...............2-48
Operation, Universal Home Remote System........2-52Other Warning Devices...................................... 3-6
Outlet Adjustment............................................3-28
Outlets
Accessory Power.........................................3-20
Outside
Convex Mirror.............................................2-48
Curb View Assist Mirror................................2-47
Heated Mirrors............................................2-48
Manual Mirrors............................................2-46
Power Mirrors.............................................2-47
Overhead Console..........................................2-57
Owner Checks and Services.............................. 6-9
Owners, Canadian............................................... ii
P
Paint, Damage..............................................5-106
Park Brake....................................................2-33
Park (P)
Shifting Into................................................2-34
Shifting Out of............................................2-36
Parking
Over Things That Burn.................................2-37
Passenger Airbag Status Indicator.....................3-34
Passenger Sensing System..............................1-61
Passing.........................................................4-12
PASS-Key
®III+..............................................2-18
PASS-Key®III+ Operation................................2-18
Passlock®......................................................2-17
9

Removing the Flat Tire and Installing the
Spare Tire..................................................5-87
Removing the Spare Tire and Tools...................5-84
Replacement Bulbs.........................................5-54
Replacement Parts, Maintenance......................6-14
Reporting Safety Defects
Canadian Government..................................7-16
General Motors...........................................7-16
United States Government............................7-15
Restraint System Check
Checking the Restraint Systems....................1-68
Replacing Restraint System Parts
After a Crash..........................................1-69
Retained Accessory Power (RAP)......................2-22
Roadside
Assistance Program....................................... 7-8
Rocking Your Vehicle to Get it Out....................4-34
Routing, Engine Drive Belt...............................6-15
Running Out of Fuel........................................2-38
S
Safety Belt
Reminder Light............................................3-32
Safety Belts
Care of....................................................5-103
How to Wear Safety Belts Properly................1-18
Lap-Shoulder Belt........................................1-26
Safety Belt Extender....................................1-31Safety Belts (cont.)
Safety Belt Use During Pregnancy.................1-31
Safety Belts Are for Everyone.......................1-13
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seats
Head Restraints..........................................1-10
Heated Seats............................................... 1-4
Manual Lumbar............................................. 1-3
Memory, Mirrors and Pedals........................... 1-5
Power Lumbar.............................................. 1-4
Power Seats................................................. 1-3
Rear Seat Operation....................................1-11
Reclining Seatbacks...................................... 1-7
Secondary Latch System.................................5-92
Securing a Child Restraint
Center Rear Seat Position............................1-49
Rear Outside Seat Position...........................1-47
Right Front Seat Position..............................1-50
Security Light.................................................3-46
Service........................................................... 5-3
Accessories and Modications......................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-5
California Pershlorate Materials Requirements . . . 5-4
California Proposition 65 Warning.................... 5-4
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-41
11