tow GMC SUBURBAN 1999 Owner's Manual

Braking/Anti-lock Brakes
Steering
Driving Tips for Various Road Conditions
Off-Road DrivingRecreational Vehicle Towing
Loading Your Vehicle
Towing a Trailer Heating and Air Conditioning
Setting the Radio ClockRadio/Cassette Player/CD Player
Radio Theft-Deterrent Feature (If Equipped)
Hazard Warning Flashers
Jump Starting
Towing Your VehicleEngine Overheating
Changing a Flat Tire
If You're Stuck
Problems on the Road
Section
5
Section
4
Section
3
Comfort Controls and Audio Systems
Your Driving and the Road
iii

1-3
Manual Cushion Tilt (If Equipped)
If your vehicle has this feature, you can raise or lower
the front of the driver's or passenger's seat with this
lever located at the inside edge of the seat. To raise or
lower the front of the seat, move the lever up or down
in a continuous motion until the cushion reaches the
desired height.
Manual Lumbar Control (If Equipped)
If your vehicle has a
lumbar adjustment, you
can increase or decrease
lumbar support in an area
of the lower seatback.
To increase support, turn the knob towards the front of
the vehicle. Operating effort can be reduced if you lean
forward slightly while turning the knob.
To decrease support, turn the knob towards the rear of
the vehicle.

1-4 Power Seat(s) (If Equipped)
Horizontal Control: If your vehicle has a power seat,
you can adjust it with these controls located at the
outside edge of the seat.Raise the front of the seat cushion by raising the forward
edge of the button. Lower the front of the seat cushion
by lowering the forward edge of the button. Move the
seat forward by moving the whole button toward the
front of the vehicle.
Raise the rear of the seat cushion by raising the rear
edge of the button. Lower the rear of the seat cushion
by lowering the rear edge of the button. Move the seat
rearward by moving the whole button toward the rear of
the vehicle.
Moving the whole button up or down raises or lowers
the entire seat cushion.
Vertical Control: If your vehicle has the power
reclining seats, you can use this button to adjust the
angle of the seatback. Move the reclining front seatback
rearward by moving the button toward the rear of the
vehicle. Move the seatback forward by moving the
button toward the front of the vehicle. See ªReclining
Seatbacksº in the Index for further information.

1-11
Entry to the Third Seat
Suburban/Yukon XL: The passenger's side of the
second row 60/40 or rear bucket seats has an easy entry
feature. This makes it easy to get in and out of the third
seat, if your vehicle has one.
To operate the easy entry seat, rotate the release lever,
located near the back of the seat rearward.
Tilt the seatback toward the front of the vehicle by
pulling the top of the seatback forward.
When you do, the seat bottom will release. Just pull the
seat forward until it stops.
Be sure to return the seat to the passenger position when
finished. Pull forward and push rearward on the seat to
make sure it is locked in place.Folding the Third Seat
Utility: The seatback of the third seat (if equipped)
in utility models also folds down on the floor.
To fold the seatback down,
pull up on the release lever
labeled 1 located on the rear
of the seatback, then push
the seatback forward.
To return the seat to the passenger position, pull up
on the release lever labeled 1 and then pull up on the
seatback until it locks into the upright position. Push
forward on the seatback to make sure it is locked
into position.

1-14
To unlatch the seat from the
back of the floor, pull up on
the release lever labeled 2
at the rear of the seat and
lift the rear of the seat up
from the floor.
Pull on the release lever located in the lower middle to
unlatch the seat from the front of the floor and pull the
seat out. Use one hand on the release lever and the other
on the handle to pull the seat out.
Suburban/Yukon XL: If your vehicle has third row
seating, it can be taken out for more cargo space.
To remove the seat, fully open the rear doors and enter
the rear of the vehicle.Fold the seatback forward into the seat cushion by using
the lever labeled 1. The seat cannot be removed unless
the seatback is folded.
To unlatch the seat from the floor, pull up on the release
lever labeled 2 at the rear of the seat and lift the rear of
the seat up, off of the floor.
Pull on the strap at the rear of the seat to release the
front seat latches. Then, pull the seat straight back,
towards the rear of the vehicle and remove it. There are
wheels at the front of the seat to assist you.
Replacing the Rear Seat (Third Row Seats)
Utility: To put the seat back in, place the front of
the seat on the load floor facing towards the front of
the vehicle. Slide the wheels into the slots on the floor
and lock into place using the hooks there. Once the
latches are engaged pull on lever 3 to let the seat drop
into place. Release the lever labeled 1 to return the seat
to its upright position. Push and pull on the seat to make
sure it is locked into place.

1-15
Suburban/Yukon XL: To put the seat back in,
place the front of the seat on the load floor, facing the
front of the vehicle. While holding the rear of the seat
up use the wheels on the front of the seat to roll it
towards the seat hooks in the floor. When the latches
are engaged in the hooks, let the seat drop into place.
Lift up on the carrying handle to make sure the seat is
locked in place.
Raise the seatback into the upright position. 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.
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.
Safety Belts: They're for Everyone
This part of the manual tells you how to use safety belts
properly. It also tells you some things you should not do
with safety belts.
And it explains the air bag system.
CAUTION:
Don't let anyone ride where he or she can't wear
a safety belt properly. If you are in a crash and
you're not wearing a safety belt, your injuries
can be much worse. You can hit things inside the
vehicle or be ejected from it. You can be seriously
injured or killed. In the same crash, you might
not be if you are buckled up. Always fasten your
safety belt, and check that your passengers' belts
are fastened properly too.

1-34
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 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.

1-47
Child Restraints
Every time infants and young children ride in
vehicles, they should have protection provided by
appropriate restraints.
Q:What are the different types of add-on
child restraints?
A:Add-on child restraints are available in four basic
types. When selecting a child restraint, take into
consideration not only the child's weight and
size, but also whether or not the restraint will be
compatible with the motor vehicle in which it will
be used.
An infant car bed (A) is a special bed made for use
in a motor vehicle. It's an infant restraint system
designed to restrain or position a child on a
continuous flat surface. With an infant car bed,
make sure that the infant's head rests toward the
center of the vehicle.

1-61
CAUTION:
Never do this.
Here two children are wearing the same belt.
The belt can't properly spread the impact forces.
In a crash, the two children can be crushed
together and seriously injured. A belt must be
used by only one person at a time.
Q:What if a child is wearing a lap-shoulder belt,
but the child is so small that the shoulder belt is
very close to the child's face or neck?
A:Move the child toward the center of the vehicle, but
be sure that the shoulder belt still is on the child's
shoulder, so that in a crash the child's upper body
would have the restraint that belts provide. If the
child is sitting in a rear seat outside position, see
ªRear Safety Belt Comfort Guidesº in the Index.
If the child is so small that the shoulder belt is still
very close to the child's face or neck, you might
want to place the child in a seat that has a lap belt,
if your vehicle has one.

2-5
If the rear lock switch is pressed with the rear doors
open, all of the doors will lock five seconds after the
cargo doors are closed.
The power door locks will operate at any time without
the ignition being on.
Operating the power locks may interact with the
theft
-deterrent system (if equipped). See ªContent
Theft
-Deterrentº in the Index.
Programmable Automatic Door Locks
Your vehicle is equipped with an auto lock/unlock
feature which enables you to program your power
door locks.
Your vehicle left the factory programmed to have the
automatic lock feature lock all the doors when the
vehicle speed is greater than 15 mph (24 km/h) for
two seconds, and then unlock all the doors once the key
is removed from the ignition. The following instructions
detail how to program your door locks.To enter the program mode you need to:
1. Beginning with the ignition in OFF, pull back on the
turn signal/multifunction lever all the way toward
you and hold it while you perform the next step.
2. Turn your key to ON and OFF twice. Then, with the
key in OFF, release the turn signal/multifunction
lever. Once you do this, you will hear the lock switch
lock and unlock.
3. You are now ready to program the automatic door
locks. Select one of the following four programming
options and follow the instructions. You will have ten
seconds to begin programming. If you exceed the ten
second limit, the locks will automatically lock and
unlock to indicate you have left the program mode.
If this occurs, repeat the procedure beginning with
step 1. You can exit the program mode any time by
turning the ignition to ON (the locks will automatically
lock and unlock to indicate you are leaving the
program mode). If the lock/unlock switches are not
pressed while in the programming mode, the auto
lock/unlock setting will not be modified.