2005 GMC ENVOY fuel additives

Service............................................................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside
of Your Vehicle...........................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Engine Oil Life System..................................5-19
Engine Air Cleaner/Filter................................5-20
Automatic Transmission Fluid.........................5-22
Engine Coolant.............................................5-25
Radiator Pressure Cap..................................5-28
Engine Overheating.......................................5-28
Cooling System............................................5-30Engine Fan Noise.........................................5-35
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-36
Brakes........................................................5-37
Battery........................................................5-41
Jump Starting...............................................5-42
Rear Axle.......................................................5-47
Four-Wheel Drive............................................5-48
Front Axle......................................................5-48
Bulb Replacement..........................................5-49
Halogen Bulbs..............................................5-49
Headlamps, Front Turn Signal, Sidemarker,
and Parking Lamps....................................5-50
Taillamps, Turn Signal, and Stoplamps............5-50
Back-Up Lamps............................................5-51
Replacement Bulbs.......................................5-51
Windshield Wiper Blade Replacement..............5-52
Tires..............................................................5-54
Tire Sidewall Labelling...................................5-55
Tire Terminology and Denitions.....................5-58
Ination - Tire Pressure.................................5-61
Tire Inspection and Rotation...........................5-62
When It Is Time for New Tires.......................5-64
Section 5 Service and Appearance Care
5-1

Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent engine and fuel system deposits from forming,
allowing your emission control system to work properly.
In most cases, you should not have to add anything to
your fuel. However, some gasolines contain only the
minimum amount of additive required to meet U.S.
Environmental Protection Agency regulations.
General Motors recommends that you buy gasolines
that are advertised to help keep fuel injectors and intake
valves clean. If your vehicle experiences problems due to
dirty injectors or valves, try a different brand of gasoline.
Also, your GM dealer has additives that will help correct
and prevent most deposit-related problems.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines may be available in
your area to contribute to clean air. General Motors
recommends that you use these gasolines, particularly if
they comply with the specications described earlier.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing additive
called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you buy
gasoline whether the fuel contains MMT. General Motors
does not recommend the use of such gasolines.
Fuels containing MMT can reduce the life of spark plugs
and the performance of the emission control system
may be affected. The malfunction indicator lamp
may turn on. If this occurs, return to your authorized
GM dealer for service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to nd. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
5-6

A
Accessory Inator...........................................5-69
Accessory Power Outlets.................................3-19
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-63
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-96
Adjustable Throttle and Brake Pedal..................2-21
Air Cleaner/Filter, Engine.................................5-20
Air Conditioning......................................3-21, 3-23
Airbag
Passenger Status Indicator...........................3-37
Readiness Light..........................................3-36
Airbag Sensing and Diagnostic Module (SDM)....7-10
Airbag System................................................1-48
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-63
How Does an Airbag Restrain?......................1-55
Passenger Sensing System...........................1-58
Servicing Your Airbag-Equipped Vehicle..........1-62
What Makes an Airbag Inate?......................1-55
What Will You See After an Airbag Inates?....1-56
When Should an Airbag Inate?....................1-53
Where Are the Airbags?...............................1-50
Antenna, Fixed Mast......................................3-139
Antenna, XM™ Satellite Radio Antenna System . . . 3-139
Anti-Lock Brake System (ABS)........................... 4-7Anti-Lock Brake, System Warning Light..............3-41
Appearance Care............................................5-86
Aluminum Wheels........................................5-91
Care of Safety Belts....................................5-89
Chemical Paint Spotting...............................5-93
Cleaning Exterior Lamps/Lenses....................5-90
Fabric/Carpet..............................................5-86
Finish Care.................................................5-90
Finish Damage............................................5-93
Glass Surfaces............................................5-88
Instrument Panel.........................................5-88
Interior Plastic Components...........................5-88
Leather......................................................5-88
Sheet Metal Damage...................................5-92
Tires..........................................................5-92
Underbody Maintenance...............................5-93
Vehicle Care/Appearance Materials................5-94
Vinyl..........................................................5-88
Washing Your Vehicle...................................5-89
Weatherstrips..............................................5-89
Windshield, Backglass, and Wiper Blades.......5-91
Ashtrays........................................................3-20
Assist Handles...............................................2-55
Audio System(s).............................................3-65
Audio Steering Wheel Controls....................3-136
Care of Your Cassette Tape Player...............3-137
Care of Your CD and DVD Player................3-139
1

E
Electrical System
Add-On Equipment......................................5-96
Engine Compartment Fuse Block...................5-97
Fuses and Circuit Breakers...........................5-97
Headlamps.................................................5-96
Power Windows and Other Power Options......5-96
Rear Underseat Fuse Block.........................5-106
Windshield Wiper Fuses...............................5-96
Engine
Air Cleaner/Filter.........................................5-20
Battery.......................................................5-41
Change Engine Oil Light...............................3-46
Check and Service Engine Soon Light............3-42
Coolant......................................................5-25
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-41
Engine Compartment Overview......................5-12
Exhaust.....................................................2-34
Fan Noise..................................................5-35
Oil .............................................................5-16
Overheating................................................5-28
Reduced Power Light...................................3-47
Starting......................................................2-20
Entry Lighting.................................................3-19
Event Data Recorders (EDR)............................7-10
Exit Lighting...................................................3-19
Extender, Safety Belt.......................................1-26
F
Filter
Engine Air Cleaner......................................5-20
Finish Damage...............................................5-93
Fixed Mast Antenna.......................................3-139
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-70
Flat Tire, Changing.........................................5-71
Flat Tire, Storing.............................................5-82
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-36
Windshield Washer......................................5-36
Fog Lamps....................................................3-17
Four-Wheel Drive....................................2-26, 5-48
Front Axle......................................................5-48
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-5
Check Gas Cap Light...................................3-51
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-50
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-51
5