|
Home >
Resources
> Owner's FAQ >
Controls > Automatic Transfer Case
Chevrolet Avalanche Owner's FAQ Controls
What does Auto 4WD do?
What does 2 HI do?
What does 4 HI do?
What does 4 LO do?
How do I switch the automatic transfer case into
neutral?
How do I switch the automatic transfer case out of
neutral?
Can I change the transfer case setting when I'm
moving?
How come I can't change the setting on my automatic
transfer case?
How come I can't engage 4 LO?
When should I use Auto 4WD?
When should I use 2 HI?
When should I use 4 HI?
When should I use 4 LO?
The Message Center is displaying SERVICE 4WD.
Is something wrong and what should I do?
Automatic Transfer Case - Auto
4WD Function
Auto 4WD is not the same as All-Wheel-Drive (AWD).
When Auto 4WD is engaged (small yellow indicator light on) all of the
power still goes to your Avalanche's rear wheels. However, the
front axle is engaged. If your rear wheels slip, say due to ice,
snow, or sand, the power is then transferred to the front wheels.
It's like having on demand 4-wheel drive.
You can find more information in your Owner's
Manual on page 2-36. [Back Up]
Automatic Transfer Case - 2 Hi
Function
2 Hi is used when you don't want the front axle
engaged. When 2 Hi is selected (small yellow indicator light on)
all of the power goes to your Avalanche's rear wheels. The front
axle will never engage.
You can find more information in your Owner's
Manual on page 2-36. [Back Up]
Automatic Transfer Case - 4 Hi
Function
4 Hi is used when you want the front axle
engaged. When 4 Hi is selected (small yellow indicator light on)
both the front and rear axles are engaged. Your engine power goes
to all four wheels providing additional traction.
You can find more information in your Owner's
Manual on page 2-37. [Back Up]
Automatic Transfer Case -4 Lo
Function
4 Lo is used when you want the front axle engaged and
maximum traction. When 4 Lo is selected (small yellow indicator
light on) both the front and rear axles are engaged and extra torque is
delivered to all four wheels providing the maximum amount of traction.
You can find more information in your Owner's
Manual on page 2-37. [Back Up]
Automatic Transfer Case -
Neutral On
Although your Automatic Transfer Case has a neutral
setting, you'll notice that you don't have a neutral button. To
shift your transfer case into neutral, you need to follow this
procedure:
-
Set your parking brake. Failure to do
this can result in damage to your Avalanche, serious injury or death
to yourself or other parties.
-
Start your Avalanche and connect it to the towing
vehicle.
-
Put your Transmission to Neutral by using the
Column Shifter.
-
Select 2 Hi on your Automatic Transfer Case.
-
Simultaneously press and hold the 2 Hi and 4 Lo
buttons on the Automatic Transfer Case for 10 seconds. When
the small red indicator light next to the word, "Neutral,"
comes on, you have completed the procedure.
-
Shift the transmission to Reverse for one second.
-
Shift the transmission to Drive for one second.
-
Turn the Ignition off (shut down your Avalanche).
Be sure to leave your transmission in Drive when you turn the
ignition off.
-
Put the Transmission into Park after turning the
ignition off.
-
Release the parking brake before towing. Failure
to do this can result in serious damage to your Avalanche and/or the
vehicle towing it.
You can find more information in your Owner's
Manual on page 2-39. [Back Up]
Automatic Transfer Case
- Neutral Off
Although your Automatic Transfer Case has a neutral
setting, you'll notice that you don't have a neutral button. If
you have put your Automatic Transfer Case into Neutral, follow this
procedure to take it out:
-
Set your parking brake and apply your regular
brake. Failure to do this can result in damage to your
Avalanche, serious injury or death to yourself or other parties.
-
Shift your transmission to Neutral.
-
With the transmission still in Neutral, turn the
Ignition switch to run. Do not start your Avalanche.
-
Press 2 Hi or any other setting on your Automatic
Transfer Case.
-
When the setting you desire is made, the small
red indicator light next to Neutral on your Automatic Transfer Case
will go out.
-
With the transmission still in Neutral, start up
your Avalanche and release the parking brake. Failure to
follow this procedure can result in series damage to your Avalanche.
-
Select a drive gear and the procedure is
complete.
You can find more information in your Owner's
Manual on page 2-39. [Back Up]
Automatic Transfer Case -
Changing Setting
It is safe to change the Automatic Transfer Case
setting when you're moving with exception to 4 Lo. Traveling at
any speed under any condition you can switch between Auto 4WD, 2 Hi, and
4 Hi at will.
You can find more information in your Owner's
Manual on page 2-38. [Back Up]
Automatic Transfer Case - Won't
Change Setting
If you make a selection on your Automatic Transfer
Case that the computer system deems may cause damage to your vehicle, it
will not allow you to make the change. When you press a button on
your Automatic Transfer Case the yellow indicator lamp will blink until
the change is complete. If the change does not take, the indicator
will go off and return to the prior selection. If the problem
persists you should contact your dealer as this may indicate a problem
with the system.
You can find more information in your Owner's
Manual on page 2-38. [Back Up]
Automatic Transfer Case -
Engaging 4 Lo
Engaging 4 Lo requires a different procedure than the
other settings for your Automatic Transfer Case. To shift into 4
Lo you need to follow this procedure:
-
With the engine running your vehicle must be at a
stand still or moving no faster than 3 MPH. Ideally you should
be moving from 1 to 2 MPH.
-
But your Transmission in Neutral using the Column
Shifter while rolling slowly or at a stand still and press and
release the 4 Lo button on your Automatic Transfer Case.
-
You must wait for the small yellow indicator
light to stop flashing before selecting a gear in your
Transmission. If the light stops flashing and your Automatic
Transfer Case returns to the original setting you were moving to
fast for 4 Lo to engage.
You can find more information in your Owner's
Manual on page 2-38. [Back Up]
Automatic Transfer Case -
Use Auto 4WD
Auto 4WD is best used when road conditions are
variable. Driving on slushy pavement in the winter, in a rural
area where the pavement transitions from asphalt to gravel.
Driving in Auto 4WD will cause a slight reduction in fuel economy.
You can find more information in your Owner's
Manual on page 2-36. [Back Up]
Automatic Transfer Case -
Use 2 Hi
2 Hi is best used during normal driving
conditions. When you are driving on pavement, improved gravel
roads, even when things are wet and in the rain. A wise person
once told me that even in off-road driving you use 2 Hi to get where you
are going, and 4 Hi to get yourself out of trouble. Driving in 2
Hi will give you the best fuel economy and help extend the life of your
Avalanche.
You can find more information in your Owner's
Manual on page 2-36. [Back Up]
Automatic Transfer Case -
Use 4 Hi
4 Hi is best used during severe driving
conditions. When you have to drive in deep snow, mud, off road
where you have to climb over obstacles, snowplowing, pulling a trailer
up a slippery wet boat ramp, or through standing water (always use
extreme caution when driving through standing water). You
should never drive with Automatic Transfer Case in 4 Hi on normal dry or
wet pavement. The Chevrolet Avalanche is equipped with a part-time
4-wheel drive system and is not designed for continuous operation.
If you do operate with 4 Hi engaged under all driving conditions you
will shorten the life of your truck. Driving in 4 Hi will lower
your fuel economy.
You can find more information in your Owner's
Manual on page 2-37. [Back Up]
Automatic Transfer Case -
Use 4 Lo
4 Lo is best used during the most extreme of
conditions. When you have to drive in deep mud, soft sand, severe
off road conditions or extremely steep terrain, extreme winter
conditions, or pulling a trailer up a steep boat ramp under load.
You should never drive with Automatic Transfer Case in 4 Lo on normal
dry or wet pavement. The Chevrolet Avalanche is equipped with a
part-time 4-wheel drive system and is not designed for continuous
operation. Under normal driving conditions it would be impossible
to operate your Avalanche in 4 Lo full-time. Driving in 4 Lo will
drastically lower your fuel economy.
You can find more information in your Owner's
Manual on page 2-37. [Back Up]
Message Center - SERVICE 4WD
When SERVICE 4WD appears on your Message
Center it indicates that there is a problem with your Automatic Transfer
Case. The system is designed to catch many problems before they
become catastrophic. When SERVICE 4WD appears you should contact
your local Chevrolet dealer immediately.
You can find more information in your Owner's
Manual on page 2-121. [Back Up]
|
