2002 GMC YUKON wheel

1-16
4. Squeeze the release lever, located in the lower
middle to unlatch the seat from the floor, while
pulling the seat out.
5. While holding the rear of the seat up, roll the seat out
of the vehicle.
Replacing the 50/50 Split Bench Seat
CAUTION:
If the seatback isn't locked, it could move forward
in a sudden stop or crash. That could cause injury
to the person sitting there. Always press rearward
on the seatback to be sure it is locked.
CAUTION:
A seat that isn't locked into place properly can
move around in a collision or sudden stop. People
in the vehicle could be injured. Be sure to lock
the seat into place properly when installing it.
CAUTION:
A safety belt that is improperly routed, not
properly attached, or twisted won't provide the
protection needed in a crash. The person wearing
the belt could be seriously injured. After
installing the seat, always check to be sure that
the safety belts are properly routed and attached,
and are not twisted.
To reinstall the 50/50 split bench, do the following:
1. While holding the rear of the seat up, slide the front
wheels into the slots on the floor. The front latches
should lock into place. If the latches do not lock, try
tilting the rear of the seats upwards.
2. Once the latches are engaged, let the seat drop into
place. Release the lever labeled 1 to return the seat to
its upright position.
3. Push and pull on the seat to make sure it is
locked into place. The seatback cannot be raised
to the upright position unless the seat is secured
to the floor.

1-21
CAUTION:
A safety belt that is improperly routed, not
properly attached, or twisted won't provide
the protection needed in a crash. The person
wearing the belt could be seriously injured. After
installing the seat, always check to be sure that
the safety belts are properly routed and attached,
and are not twisted.
To reinstall the full bench seat, do the following:
1. While holding the rear of the seat up, slide the front
wheels into the slots on the floor. The front latches
should lock into place. If the latches do not lock, try
tilting the rear of the seats upwards.
2. Once the latches are engaged, let the seat drop into
place. Release the lever labeled 1 to return the seat to
its upright position.
3. Push and pull on the seat to make sure it is
locked into place. The seatback cannot be raised
to the upright position unless the seat is secured
to the floor.
Entering or Exiting the Third Row Seats
CAUTION:
If the seatback isn't locked, it could move forward
in a sudden stop or crash. That could cause injury
to the person sitting there. Always press rearward
on the seatback to be sure it is locked.
CAUTION:
If any easy entry seat isn't locked, it can move. In a
sudden stop or crash, the person sitting there could
be injured. And, even if there is no crash or sudden
stop, a driver sitting in an unlocked easy entry seat
could be startled by the sudden movement and hit
the wrong control or pedal, causing an accident.
After you've used it, be sure to push rearward on
any easy entry seat to be sure it is locked.

1-24 Why Safety Belts Work
When you ride in or on anything, you go as fast as
it goes.
Take the simplest vehicle. Suppose it's just a seat
on wheels.
Put someone on it.

1-39 How the Air Bag Systems Work
Where are the air bags?
The driver's frontal air bag is in the middle of the
steering wheel.
The right front passenger's frontal air bag is in the
instrument panel on the passenger's side.
The driver's side impact air bag is in the side of the
driver's seatback closest to the door.

1-40
The right front passenger's side impact air bag is in the
side of the passenger's seatback closest to the door.
CAUTION:
If something is between an occupant and an air
bag, the bag might not inflate properly or it
might force the object into that person causing
severe injury or even death. The path of an
inflating air bag must be kept clear. Don't put
anything between an occupant and an air bag,
and don't attach or put anything on the steering
wheel hub or on or near any other air bag
covering. Don't let seat covers block the inflation
path of a side impact air bag.

1-41
When should an air bag inflate?
The driver's and right front passenger's frontal air bags
are designed to inflate in moderate to severe frontal or
near
-frontal crashes. But they are designed to inflate
only if the impact speed is above the system's designed
ªthreshold level.º
If your vehicle goes straight into a wall that doesn't
move or deform, the threshold level is about 9 to
16 mph (14 to 26 km/h). The threshold level can vary,
however, with specific vehicle design, so that it can be
somewhat above or below this range.
If your vehicle strikes something that will move or
deform, such as a parked car, the threshold level will be
higher. The driver's and right front passenger's frontal
air bags are not designed to inflate in rollovers, rear
impacts, or in many side impacts because inflation
would not help the occupant.
The side impact air bags are designed to inflate in
moderate to severe side crashes. A side impact air bag
will inflate if the crash severity is above the system's
designed ªthreshold level.º The threshold level can vary
with specific vehicle design. Side impact air bags are not
designed to inflate in frontal or near
-frontal impacts,
rollovers or rear impacts, because inflation would not
help the occupant. A side impact air bag will only
deploy on the side of the vehicle that is struck.In any particular crash, no one can say whether an air
bag should have inflated simply because of the damage
to a vehicle or because of what the repair costs were.
For frontal air bags, inflation is determined by the angle
of the impact and how quickly the vehicle slows down
in frontal and near
-frontal impacts. For side impact air
bags, inflation is determined by the location and severity
of the impact.
The air bag system is designed to work properly under
a wide range of conditions, including off
-road usage.
Observe safe driving speeds, especially on rough terrain.
As always, wear your safety belt. See ªOff
-Road
Drivingº in the Index for more tips on off
-road driving.
What makes an air bag inflate?
In an impact of sufficient severity, the air bag sensing
system detects that the vehicle is in a crash. For both
frontal and side impact air bags, the sensing system
triggers a release of gas from the inflator, which inflates
the air bag. The inflator, air bag and related hardware
are all part of the air bag modules inside the steering
wheel, instrument panel and the side of the front
seatbacks closest to the door.

1-42
How does an air bag restrain?
In moderate to severe frontal or near frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. In moderate to severe side
collisions, even belted occupants can contact the inside
of the vehicle. The air bag supplements the protection
provided by safety belts. Air bags distribute the force of
the impact more evenly over the occupant's upper body,
stopping the occupant more gradually. But the frontal air
bags would not help you in many types of collisions,
including rollovers, rear impacts, and many side
impacts, primarily because an occupant's motion is not
toward the air bag. Side impact air bags would not help
you in many types of collisions, including frontal or
near frontal collisions, rollovers, and rear impacts,
primarily because an occupant's motion is not toward
those air bags. Air bags should never be regarded as
anything more than a supplement to safety belts, and
then only in moderate to severe frontal or near
-frontal
collisions for the driver's and right front passenger's
frontal air bags, and only in moderate to severe side
collisions for the driver's and right front passenger's
side impact air bags.What will you see after an air bag inflates?
After an air bag inflates, it quickly deflates, so quickly
that some people may not even realize the air bag
inflated. Some components of the air bag module
-- the
steering wheel hub for the driver's air bag, the
instrument panel for the right front passenger's bag, the
side of the seatback closest to the door for the driver and
right front passenger's side impact air bags
-- will be
hot for a short time. The parts of the bag that come into
contact with you may be warm, but not too hot to touch.
There will be some smoke and dust coming from the
vents in the deflated air bags. Air bag inflation doesn't
prevent the driver from seeing or being able to steer the
vehicle, nor does it stop people from leaving the vehicle.
CAUTION:
When an air bag inflates, there is dust in the air.
This dust could cause breathing problems for
people with a history of asthma or other
breathing trouble. To avoid this, everyone in the
vehicle should get out as soon as it is safe to do so.
If you have breathing problems but can't get out
of the vehicle after an air bag inflates, then get
fresh air by opening a window or a door.

1-43
In many crashes severe enough to inflate an air
bag, windshields are broken by vehicle deformation.
Additional windshield breakage may also occur from
the right front passenger air bag.

Air bags are designed to inflate only once. After an
air bag inflates, you'll need some new parts for your
air bag system. If you don't get them, the air bag
system won't be there to help protect you in another
crash. A new system will include air bag modules
and possibly other parts. The service manual for your
vehicle covers the need to replace other parts.

Your vehicle is equipped with a crash sensing and
diagnostic module, which records information about
the frontal air bag system. The module records
information about the readiness of the system, when
the system commands air bag inflation and driver's
safety belt usage at deployment. The module also
records speed, engine rpm, brake and throttle data.

Let only qualified technicians work on your air
bag systems. Improper service can mean that an
air bag system won't work properly. See your dealer
for service.
NOTICE:
If you damage the covering for the driver's or
the right front passenger's air bag, or the air
bag covering on the driver's and right front
passenger's seatback, the bag may not work
properly. You may have to replace the air bag
module in the steering wheel, both the air bag
module and the instrument panel for the right
front passenger's air bag, or both the air bag
module and seatback for the driver's and right
front passenger's side impact air bag. Do not
open or break the air bag coverings.