2005 CHEVROLET TAHOE fuel additives

Service............................................................5-3
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of
Your Vehicle..............................................5-4
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuel E-85 (85% Ethanol).................................5-6
Fuels in Foreign Countries...............................5-8
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Engine Oil Life System..................................5-19
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid.........................5-23
Engine Coolant.............................................5-26
Coolant Surge Tank Pressure Cap..................5-28
Engine Overheating.......................................5-28
Overheated Engine Protection
Operating Mode........................................5-30Cooling System............................................5-30
Engine Fan Noise.........................................5-35
Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-37
Brakes........................................................5-38
Battery........................................................5-41
Jump Starting...............................................5-42
All-Wheel Drive..............................................5-47
Rear Axle.......................................................5-48
Four-Wheel Drive............................................5-49
Front Axle......................................................5-50
Bulb Replacement..........................................5-52
Halogen Bulbs..............................................5-52
Headlamps..................................................5-52
Front Turn Signal, Sidemarker and Daytime
Running Lamps.........................................5-53
Side Identication Marker Lamps.....................5-54
Roof Marker Lamps......................................5-55
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps.........................................5-57
Replacement Bulbs.......................................5-58
Windshield Wiper Blade Replacement..............5-59
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.
Fuel E-85 (85% Ethanol)
The 8th digit of your vehicle identication number (VIN)
shows the code letter or number that identies your
engine. You will nd the VIN at the top left of the
instrument panel. SeeVehicle Identication
Number (VIN) on page 5-106.
If your vehicle has the 5.3L V8 engine (VIN Code Z
only), you may use either regular unleaded gasoline or
ethanol fuel containing up to 85% ethanol (E-85);
also seeFuel on page 5-5. In all other engines, including
the 5.3L V8 (VIN Code T), use only regular unleaded
gasoline.
Only vehicles that have the 5.3L V8 engine
(VIN Code Z) may use 85% ethanol fuel (E-85).
5-6

General Motors encourages the use of E-85 in vehicles
that are designed to use it. The ethanol in E-85 is a
“renewable” fuel, meaning it is made from renewable
sources such as corn and other crops.
Many service stations will not have an 85% ethanol
fuel (E-85) pump available. The U. S. Department
of Energy has an alternative fuels website
(http://www.afdc.doe.gov/refueling_mapsite.shtml) that
can help you nd E-85 fuel. Those stations that do have
E-85 should have a label indicating ethanol content.
Do not use the fuel if the ethanol content isgreaterthan
85%. Your vehicle may not operate properly if the
ethanol content is greater than 85%.
At a minimum, E-85 should meet
ASTM Specication D 5798.
To ensure quick starts in the wintertime, the E-85 fuel
must be formulated properly for your climate according
to ASTM specication D 5798. If you have trouble
starting on E-85, it may be because your E-85 fuel is
not properly formulated for your climate. If this happens,
switching to gasoline or adding gasoline to your fuel
tank may improve starting. Your vehicle is designed to
accommodate a mixture of gasoline and E-85 fuel.For good starting and heater efficiency below 32°F
(0°C), the fuel mix in the fuel tank should contain no
more than 70% ethanol.
E-85 has less energy per gallon than gasoline, so you
will need to rell your fuel tank more often when
using E-85 than when you are using gasoline. Regular
unleaded gasoline is recommended when pulling a
trailer. For payload capacity with ethanol fuel, see
Loading Your Vehicle on page 4-52.
Notice:Some additives are not compatible with
E-85 fuel and may harm your fuel system. Damage
caused by additives would not be covered by
your new vehicle warranty. Do not use additives
with E-85 fuel.
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.
5-7

A
Accessory Power Outlets.................................3-20
Adding a Snow Plow or Similar Equipment.........4-57
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-82
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-107
Adjustable Throttle and Brake Pedal..................2-22
Air Cleaner/Filter, Engine.................................5-21
Air Conditioning..............................3-21, 3-22, 3-25
Airbag
Passenger Status Indicator...........................3-40
Readiness Light..........................................3-39
Airbag Sensing and Diagnostic Module (SDM)...... 7-9
Airbag System................................................1-68
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-82
How Does an Airbag Restrain?......................1-75
Passenger Sensing System...........................1-78
Servicing Your Airbag-Equipped Vehicle..........1-82
What Makes an Airbag Inate?......................1-75
What Will You See After an Airbag Inates?....1-76
When Should an Airbag Inate?....................1-73
Where Are the Airbags?...............................1-71
All-Wheel Drive...............................................5-47
All-Wheel Drive with StabiliTrak
®.......................2-32AM-FM Radio.................................................3-79
Antenna, Fixed Mast......................................3-138
Antenna, XM™ Satellite Radio Antenna
System.....................................................3-138
Anti-Lock Brake System (ABS)........................... 4-7
Anti-Lock Brake, System Warning Light..............3-45
Appearance Care............................................5-97
Aluminum or Chrome-Plated Wheels.............5-103
Care of Safety Belts...................................5-101
Chemical Paint Spotting..............................5-104
Cleaning Exterior Lamps/Lenses..................5-101
Cleaning the Inside of Your Vehicle................5-98
Fabric/Carpet..............................................5-99
Finish Care...............................................5-102
Finish Damage..........................................5-104
Instrument Panel, Vinyl, and Other Plastic
Surfaces...............................................5-100
Leather....................................................5-100
Sheet Metal Damage..................................5-104
Tires........................................................5-104
Underbody Maintenance.............................5-104
Vehicle Care/Appearance Materials...............5-105
Washing Your Vehicle.................................5-101
Weatherstrips............................................5-101
Windshield, Backglass, and Wiper Blades......5-102
Ashtrays........................................................3-21
1

Flat Tire, Storing.............................................5-92
Fluid
Automatic Transmission................................5-23
Power Steering...........................................5-36
Windshield Washer......................................5-37
Fog Lamps....................................................3-17
Four-Wheel Drive....................................2-28, 5-49
Four-Wheel-Drive Light....................................3-53
Front Axle......................................................5-50
Front Reading Lamps......................................3-19
Front Storage Area.........................................2-56
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-5
E-85 (85% Ethanol)....................................... 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-8
Gage.........................................................3-54
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-55
Fuses
Center Instrument Panel Fuse Block.............5-110
Fuses and Circuit Breakers.........................5-107
Instrument Panel Fuse Block.......................5-108
Underhood Fuse Block...............................5-111
Windshield Wiper.......................................5-107G
Gage
Engine Coolant Temperature.........................3-46
Fuel..........................................................3-54
Oil Pressure...............................................3-52
Speedometer..............................................3-38
Tachometer.................................................3-38
Transmission Temperature.............................3-46
Voltmeter Gage...........................................3-42
Garage Door Opener.......................................2-52
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Glove Box.....................................................2-56
GM Mobility Reimbursement Program.................. 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-8
Headlamps............................................3-14, 5-52
Automatic Headlamp System.........................3-16
Bulb Replacement.......................................5-52
Daytime Running Lamps...............................3-15
Flash-to-Pass............................................... 3-9
Front Turn Signal, Sidemarker and Daytime
Running Lamps........................................5-53
Halogen Bulbs............................................5-52
High/Low Beam Changer................................ 3-8
6