2002 CHEVROLET AVALANCHE ECU

2-14
Rear Glass Removal and Storage
CAUTION:
If the removable rear glass is not stored properly,
it could be thrown about the vehicle in a crash or
sudden maneuver. People in the vehicle could be
injured. Whenever you store the rear glass in the
vehicle, always be sure that it is stored securely in
the Midgate storage pocket.
Do not remove the rear glass when the rear defroster
is on. If you remove the rear glass with the rear defroster
on, you may see a discharge spark coming from the
latch area.
To remove the rear glass do the following:
1. Fold the rear seats. See ªRear Seatsº in the Index
for more information. The front seats will have to
be moved forward slightly to allow the rear seats to
fold completely.
Although the rear glass can be removed without
folding the rear seats, you will not be able to access
the rear glass storage pocket. Be sure to fold the
seats before removing the rear glass.

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6. Turn both glass lock knobs (D), located at both top
corners of the storage pocket, to the locked position.
You may need to push the corner of the rear glass to
allow the lock knob to engage more easily.Once both glass lock knobs are in the locked
position, the rear glass is securely stored.
7. Push both latch levers up to the locked position.
You should hear a click when each latch lever
locks correctly.
Rear seats can be returned to the normal position
when the rear glass is out and stored properly in the
storage pocket.

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If you lower the Midgate with the rear glass in the stored
position, you will notice that the entire crossbar (the bar
with the release handle) will lower with the Midgate. This is completely normal; however, since the crossbar
lowers with the Midgate, it will be heavier. As you
lower the Midgate in this configuration be ready for the
extra weight and be careful not to let the midgate fall out
of your hands as you lower it.
Raising the Midgate
To return the Midgate to its normal position, raise the
Midgate up with a slight swinging motion (this will help
to ensure that the Midgate closes with enough force to
engage the latches) until it latches into place securely.
If the rear glass is removed and you would like to put it
back, do so using the instructions given previously.

2-23
Tailgate
Use the ignition/door key to unlock/lock the tailgate.
Open the tailgate by lifting up on its handle while
pulling the tailgate toward you.
To shut the tailgate, firmly push it upward until it latches.
After you put the tailgate back up, pull it back towards
you to be sure it is latched securely.
Tailgate Removal
The tailgate on your vehicle can be removed to allow for
different loading situations. Although the tailgate can be
removed without assistance, you may want someone to
assist you with the removal to avoid possible damage to
the vehicle.To remove the tailgate, do the following:
1. Raise the tailgate
slightly and release
both retaining cable
clips. To release the
retaining cable clips,
lift the cable so it points
straight out and push
the cable clip forward.
2. With the tailgate at a slight upward angle, pull back
on the tailgate at the right edge and then move the
tailgate to the right to release the left edge.
Reverse the above procedure to reinstall. Make sure the
tailgate is secure.

2-25
Content Theft-Deterrent
Your vehicle is equipped with a Content Theft-Deterrent
alarm system.
With this system, the
SECURITY message will
flash as you open the door
(if your ignition is off).
This message reminds you to activate the theft
-deterrent
system. Here's how to do it:
1. Open the door.
2. Lock the door with the power door lock switch or the
remote keyless entry transmitter. The SECURITY
message should come on and stay on. If you're using
the remote keyless entry transmitter, the door does
not need to be open.
3. Close all doors. The SECURITY message should go
off after approximately 15 seconds. The alarm is not
armed until the SECURITY message goes off.If a door is opened without the key or the remote keyless
entry transmitter, the alarm will go off. Your vehicle's
headlamps will flash and the horn will sound for about
two minutes, then will turn off to save the battery power.
Remember, the theft
-deterrent system won't activate
if you lock the doors with a key or use the manual
door lock. It activates only if you use a power door lock
switch with the door open, or with the remote keyless
entry transmitter. You should also remember that you
can start your vehicle with the correct ignition key if the
alarm has been set off.
Here's how to avoid setting off the alarm by accident:

If you don't want to activate the theft
-deterrent
system, the vehicle should be locked with the door
key after the doors are closed.

Always unlock a door with a key, or use the remote
keyless entry transmitter. Unlocking a door any
other way will set off the alarm if the system has
been armed.
If you set off the alarm by accident, unlock any door
with the key. You can also turn off the alarm by pressing
UNLOCK on the remote keyless entry transmitter or by
placing the key in the ignition and turning it to START.

2-26
Testing the Alarm
The alarm can be tested by following these steps:
1. From inside the vehicle, lower the driver's window
and open the driver's door.
2. Activate the system by locking the doors with the
power door lock switch while the door is open,
or with the remote keyless entry transmitter.
3. Get out of the vehicle, close the door and wait for
the SECURITY message to go out.
4. Then reach in through the window, unlock the
door with the manual door lock and open the door.
This should set off the alarm.
If the alarm does not sound when it should but the
vehicle's headlamps flash, check to see if the horn
works. The horn fuse may be blown. To replace the
fuse, see ªFuses and Circuit Breakersº in the Index.
If the alarm does not sound or the vehicle's headlamps
do not flash, the vehicle should be serviced by an
authorized service center.
Passlock

Your vehicle is equipped with the Passlock
theft
-deterrent system.
Passlock is a passive theft
-deterrent system. Passlock
enables fuel to the engine if the ignition lock cylinder is
turned with a valid key. If a correct key is not used or the
ignition lock cylinder is tampered with, fuel is disabled.
If the engine stalls and the SECURITY message flashes,
wait until the light stops flashing before trying to restart
the engine. Remember to release the key from START
as soon as the engine starts.
If the engine is running and the SECURITY message
comes on, you will be able to restart the engine if you
turn the engine off. However, your Passlock system is
not working properly and must be serviced by your
dealer. Your vehicle is not protected by Passlock at this
time. You may also want to check the fuse (see ªFuses
and Circuit Breakersº in the Index). See your dealer
for service.
In an emergency, call the GM Roadside Assistance
Center. See ªRoadside Assistanceº in the Index.

2-66
Top-Box Storage
Your vehicle is equipped with Top-Box Storage units on
both sides of the vehicle. The passenger side Top Box
contains the tools you will need to change a flat tire.
Use the ignition/door key to unlock the Top Box lid if it
is locked. Press the key cylinder button and swing the
lid open. Turn on the cargo lamps if you need more
light inside the Top Boxes. See ªCargo Lampsº in
the Index for more information on cargo lamps.
Use the ignition/door key to lock the Top Boxes.
Tonneau Cover (If Equipped)
CAUTION:
Improperly stored tonneau cover component(s)
could be thrown about the vehicle during a
collision or sudden maneuver. You or others
could be injured. If you remove the cover, bows
and rails always store them properly in the cargo
area. When you put them back, always be sure
that they are securely reattached.
If your vehicle is equipped with a tonneau cover, it will
come installed from the factory. The main components
of the tonneau cover are the following:

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5. Stow both bows and the front and rear rails in the
storage bag as shown. When all components of the
tonneau cover are secured in the bag properly, zip
the bag shut.Reverse the procedure to reinstall the tonneau cover
using the following suggestions:

When reinstalling the front rail, start by holding
the back edge of the rail (edge nearest you) up and
then twisting the back edge down while pushing it
into place.

Both bows are the same size and
therefore interchangeable.

When placing the bows in the side rails, it is
easiest to place the spring
-loaded bow end in first.