2008 CHEVROLET AVALANCHE fuel

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-2
Rear Seats
..............................................1-12
Safety Belts
.............................................1-14
Child Restraints
.......................................1-35
Airbag System
.........................................1-60
Restraint System Check
............................1-76
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
......................................2-10
Windows
.................................................2-23
Theft-Deterrent Systems
............................2-26
Starting and Operating Your Vehicle
...........2-30
Mirrors
....................................................2-49
Object Detection Systems
..........................2-58
OnStar
®System
......................................2-61
Universal Home Remote System
................2-64
Storage Areas
.........................................2-71
Sunroof
..................................................2-96
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-21
Warning Lights, Gages, and Indicators
........3-32
Driver Information Center (DIC)
..................3-50
Audio System(s)
.......................................3-75Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-42
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-5
Checking Things Under the Hood
...............5-12
Rear Axle
...............................................5-47
Four-Wheel Drive
.....................................5-48
Front Axle
...............................................5-49
Headlamp Aiming
.....................................5-50
Bulb Replacement
....................................5-53
Windshield Wiper Blade Replacement
.........5-55
Tires
......................................................5-56
Appearance Care
.....................................5-99
Vehicle Identication
...............................5-107
Electrical System
....................................5-108
Capacities and Specications
...................5-115
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-14
Vehicle Data Recording and Privacy
...........7-16
Index................................................................ 1
2008 Chevrolet Avalanche Owner ManualM

Keys...............................................................2-3
Remote Keyless Entry (RKE) System................2-4
Remote Keyless Entry (RKE) System
Operation...................................................2-5
Remote Vehicle Start......................................2-7
Doors and Locks............................................2-10
Door Locks..................................................2-10
Power Door Locks........................................2-10
Delayed Locking...........................................2-10
Programmable Automatic Door Locks..............2-11
Rear Door Security Locks..............................2-11
Lockout Protection........................................2-12
Midgate
®.....................................................2-12
Tailgate.......................................................2-22
Power Running Boards..................................2-22
Windows........................................................2-23
Power Windows............................................2-24
Sun Visors...................................................2-25
Theft-Deterrent Systems..................................2-26
Content Theft-Deterrent.................................2-26
PASS-Key
®III+ Electronic Immobilizer.............2-28
PASS-Key®III+ Electronic Immobilizer
Operation.................................................2-28Starting and Operating Your Vehicle................2-30
New Vehicle Break-In....................................2-30
Ignition Positions..........................................2-30
Retained Accessory Power (RAP)...................2-32
Starting the Engine.......................................2-32
Adjustable Throttle and Brake Pedal................2-33
Engine Coolant Heater..................................2-34
Active Fuel Management™.............................2-35
Automatic Transmission Operation...................2-35
Tow/Haul Mode............................................2-38
Four-Wheel Drive..........................................2-39
Parking Brake..............................................2-44
Shifting Into Park..........................................2-45
Shifting Out of Park......................................2-47
Parking Over Things That Burn.......................2-47
Engine Exhaust............................................2-48
Running the Vehicle While Parked..................2-48
Mirrors...........................................................2-49
Automatic Dimming Rearview Mirror with
OnStar
®, Compass and Temperature
Display....................................................2-49
Automatic Dimming Rearview Mirror with
Compass and Temperature Display..............2-52
Outside Power Mirrors...................................2-54
Outside Power Foldaway Mirrors.....................2-56
Section 2 Features and Controls
2-1

Laws in some communities may restrict the use of
remote starters. For example, some laws may require
a person using the remote start to have the vehicle
in view when doing so. Check local regulations for
any requirements on remote starting of vehicles.
Do not use the remote start feature if your vehicle is low
on fuel. Your vehicle may run out of fuel.
If your vehicle has the remote start feature, the RKE
transmitter functions will have an increased range
of operation. However, the range may be less while
the vehicle is running.
There are other conditions which can affect the
performance of the transmitter, seeRemote Keyless
Entry (RKE) System on page 2-4for additional
information./(Remote Start):This button will be on the RKE
transmitter if you have remote start.
To start the vehicle using the remote start feature:
1. Aim the transmitter at the vehicle.
2. Press and release the transmitter’s lock button.
The vehicle’s doors will lock. Immediately press and
hold the transmitter’s remote start button until the
turn signal lights ash. If you cannot see the vehicle’s
lights, press and hold the remote start button for
two to four seconds. Pressing the remote start
button again after the vehicle has started will turn
the engine off.
When the vehicle starts, the parking lamps will turn
on and remain on while the vehicle is running.
If the vehicle is left running it will automatically shut
off after 10 minutes unless a time extension has
been done.
3. If it is the rst remote start since the vehicle has
been driven, repeat these steps, while the engine is
still running, to extend the engine running time by
10 minutes. Remote start can be extended one time.
After entering the vehicle during a remote start, insert
and turn the key to RUN to drive the vehicle.
2-8

Before you start driving, fully press the brake pedal to
conrm the adjustment is right for you. While driving,
make only small adjustments.
Your vehicle may have a memory function which lets
pedal settings be saved and recalled. SeeMemory Seat,
Mirrors, and Pedals on page 1-6for more information.
Engine Coolant Heater
The engine coolant heater, if available, can help in cold
weather conditions at or below 0°F (−18°C) for easier
starting and better fuel economy during engine warm-up.
Plug in the coolant heater at least four hours before
starting your vehicle. An internal thermostat in the
plug-end of the cord may exist which will prevent
engine coolant heater operation at temperatures
above 0°F (−18°C).
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The cord is located on the driver’s side of the
engine compartment, near the power steering
uid reservoir.
3. Plug the cord into a normal, grounded 110-volt AC
outlet.
{CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the
wrong kind of extension cord could overheat
and cause a re. You could be seriously
injured. Plug the cord into a properly grounded
three-prong 110-volt AC outlet. If the cord will
not reach, use a heavy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts. If you do not, it could
be damaged.
2-34

How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature,
the kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you
contact your dealer/retailer in the area where you will be
parking your vehicle. The dealer/retailer can give you
the best advice for that particular area.
Active Fuel Management™
Your vehicle’s V8 engine may have Active Fuel
Management™. This system allows the engine to
operate on either all or half of its cylinders, depending
on the driving conditions.
When less power is required, such as cruising at a
constant vehicle speed, the system will operate in the
half cylinder mode, allowing your vehicle to achieve
better fuel economy. When greater power demands are
required, such as accelerating from a stop, passing,
or merging onto a freeway, the system will maintain
full-cylinder operation.
If your vehicle has an Active Fuel Management™
indicator, seeDIC Operation and Displays (With DIC
Buttons) on page 3-51orDIC Operation and Displays
(Without DIC Buttons) on page 3-56for more information
on using this display.
Automatic Transmission Operation
There are several different
positions for the shift lever.
Your vehicle has an automatic transmission with an
electronic shift position indicator within the instrument
panel cluster. This display will show the position anytime
the shift lever is moved out of PARK (P).
2-35

{CAUTION:
Shifting into a drive gear while the engine is
running at high speed is dangerous. Unless
your foot is rmly on the brake pedal, your
vehicle could move very rapidly. You could
lose control and hit people or objects. Do not
shift into a drive gear while your engine is
running at high speed.
Notice:Shifting out of PARK (P) or NEUTRAL (N)
with the engine running at high speed may damage
the transmission. The repairs would not be covered
by your warranty. Be sure the engine is not running
at high speed when shifting your vehicle.
DRIVE (D):This position is for normal driving.
It provides the best fuel economy for your vehicle.
If you need more power for passing, and you are:
Going less than about 35 mph (56 km/h), push your
accelerator pedal about halfway down.
Going about 35 mph (56 km/h) or more, push the
accelerator all the way down.DRIVE (D) can be used when towing a trailer, carrying a
heavy load, driving on steep hills or for off-road driving.
You may want to shift the transmission to THIRD (3) or,
if necessary, a lower gear selection if the transmission
shifts too often.
Downshifting the transmission in slippery road conditions
could result in skidding, see “Skidding” underLoss of
Control on page 4-11.
THIRD (3):This position is also used for normal driving.
However, it reduces vehicle speed more than DRIVE (D)
without using your brakes. You can use THIRD (3) on
hills. It can help control your speed as you go down steep
mountain roads, but then you would also want to use your
brakes off and on.
SECOND (2):This position reduces vehicle speed even
more than THIRD (3) without using your brakes. You can
use SECOND (2) on hills. It can help control your speed
as you go down steep mountain roads, but then you
would also want to use your brakes off and on.
If you select SECOND (2) and the Tow/Haul has not
been selected, the transmission will drive in SECOND (2)
gear. You may use this feature for reducing the speed of
the rear wheels when you are trying to start your vehicle
from a stop on slippery road surfaces.
If you select SECOND (2) and the Tow/Haul has also
been selected, the transmission operation will be limited
to FIRST (1) and SECOND (2) gears.
2-37

You can choose among ve driving settings:
Indicator lights in the switches show you which setting
you are in. The indicator lights will come on briey when
you turn on the ignition and the last chosen setting will
stay on. If the lights do not come on, you should take your
vehicle in for service. An indicator light will ash while
shifting. Fast ashing means the conditions were not met
to make the desired shift, typically the vehicle was going
too fast, the automatic transmission was not in neutral.
Slow ashing means the shift is in progress. It will stay
on when the shift is completed. If for some reason the
transfer case cannot make a requested shift, it will return
to the last chosen setting.
2
m(Two-Wheel Drive High):This setting is used
for driving in most street and highway situations.
Your front axle is not engaged in two-wheel drive.
This setting also provides the best fuel economy.
AUTO (Automatic Four-Wheel Drive):This setting is
ideal for use when road surface traction conditions are
variable. When driving your vehicle in AUTO, the front
axle is engaged, but the vehicle’s power is primarily
sent to the rear wheels. When the vehicle’s software
determines a need for more traction, the system will
transfer more power to the front wheels. Driving in
this mode results in slightly lower fuel economy than
Two-Wheel Drive High.4
m(Four-Wheel Drive High):Use the four-wheel
high position when you need extra traction, such as
on snowy or icy roads or in most off-road situations.
This setting also engages your front axle to help drive
your vehicle. This is the best setting to use when
plowing snow.
4
n(Four-Wheel Drive Low):This setting also
engages your front axle and delivers extra torque.
You may never need this setting. It sends maximum
power to all four wheels. You might choose Four-Wheel
Drive Low if you are driving off-road in deep sand,
deep mud, deep snow, and while climbing or descending
steep hills. StabiliTrak
®will not engage in this mode.
SeeStabiliTrak®System on page 4-6for more
information.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or someone
else could be seriously injured. Be sure to set
the parking brake before placing the transfer
case in NEUTRAL. SeeParking Brake on
page 2-44.
2-40

Fog Lamp Light............................................3-48
Cruise Control Light......................................3-48
Highbeam On Light.......................................3-48
Tow/Haul Mode Light....................................3-48
Fuel Gage...................................................3-49
Low Fuel Warning Light.................................3-50
Driver Information Center (DIC).......................3-50
DIC Operation and Displays
(With DIC Buttons)....................................3-51
DIC Operation and Displays
(Without DIC Buttons)................................3-56
DIC Warnings and Messages.........................3-59
DIC Vehicle Customization
(With DIC Buttons)....................................3-66Audio System(s).............................................3-75
Setting the Clock..........................................3-76
Radio(s) (MP3).............................................3-78
Using an MP3 (Radio with CD or
Six-Disc CD Player)...................................3-96
Using an MP3 (Radio with CD and
DVD Player)...........................................3-101
XM Radio Messages...................................3-106
Navigation/Radio System..............................3-107
Rear Seat Entertainment (RSE) System.........3-107
Rear Seat Audio (RSA)................................3-116
Theft-Deterrent Feature................................3-118
Audio Steering Wheel Controls......................3-118
Radio Reception.........................................3-119
Fixed Mast Antenna....................................3-120
XM™ Satellite Radio Antenna System............3-120
Section 3 Instrument Panel
3-2