2003 GMC SIERRA DENALI Owners Manual

Air Bag Off Light
When you turn the right front passenger’s air bag off,
this light will be lit and stay lit to remind you that the air
bag has been turned
off. This light will go off when
you turn the air bag back on again. See
Air Bag
Off Switch on page 1-64 for more on this, including
important safety information.The
AIR BAG OFF light will
look like one of the following illustrations.
United States with Passenger Sensing System
3-28

If the right front passenger’s air bag is turned
off for a person who isn’t in a risk group
identified by the national government, that
person won’t have the extra protection of an
air bag.
In a crash, the air bag wouldn’t be able
to inflate and help protect the person sitting
there. Don’t
turn off the passenger’s air bag
unless the person
sitting there is in a risk
group. See
”Air Bag Off Switch” in the Index
for more on this, including important safety
information.
I he air bag readiness I r. It ever comes ~ 7
when you have turned off the air bag, it means
that something may be wrong with the air bag
system. The right front passenger’s air bag
CAUTION: (Continued)
wuld inflate even though the svvl;ch is off. If
this ever happens, don’t let anyone whom the
national government has identified as a
member of a passenger air bag risk group
sit
in the right front passenger’s position (for
example, don’t secure a rear-facing child
restraint
in your vehicle) until you have your
vehicle serviced.
Passenger Air Bag Status Indicator
If your vehicle has the passenger sensing system your
rearview mirror will have a passenger air bag status
indicator.
Passenger Air Bag Status Indicator
- United States
3-30

~~ ~~ Passenger
Air
Bag Status
Indicator
- Canada
When the ignition key is turned to RUN or START, the
passenger air bag status indicator will light ON and
OFF, or the symbol for on and off, for several seconds
as a system check. Then, after several more seconds,
the status indicator will light either ON or OFF, or either
the on or
off symbol to let you know the status of the
right front passenger’s frontal air bag.
If the word ON or the on symbol is lit on the passenger
air bag status indicator, it means that the right front
passenger’s frontal air bag is enabled (may inflate). If the
ON indicator comes on when you have a
rear-facing child restraint installed
in the right
front passenger’s seat, it means that the
passenger sensing system has not turned
off
the passenger’s frontal air bag. A child in a
rear-facing child restraint can be seriously
injured or killed if the right front passenger’s air
bag inflates. This is because the back of the
rear-facing child restraint would be very close
to the inflating air bag. Don’t use a rear-facing
child restraint in the right front passenger’s seat unless the air bag has been turned
off.
If the word OFF or the off symbol is lit on the passenger
air bag status indicator, it means that the passenger
sensing system or the air bag
off switch has turned off the
right front passenger’s air bag. See
Passenger Sensing
System on page
1-68 or Air Bag Off Switch on page 1-64
for more on this, including important safety information.
3-3 1

If the right front passenger’s air bag is turned
off for a person who isn’t in a risk group
identified by the national government, that
person won’t have the extra protection of an
air bag.
In a crash, the air bag wouldn’t be able
to inflate and help protect the person sitting
there. Don’t turn
off the passenger’s air bag
unless the person sitting there is
in a risk
group. See ”Air Bag
Off Switch” in the Index
for more on this, including important safety information.
If, after several seconds, all status indicator lights
remain on, or
if there are no lights at all, there may be a
problem with the lights or the passenger sensing
system. See your dealer for service. If the air bag
off indicator and the air bag
readiness light ever come on together,
it
means that something may be wrong with the
air bag system.
If this ever happens, have the
vehicle serviced promptly, because an
adult-size person sitting
in the right front
passenger seat may not have the protection of
the air bag. See ”Air Bag Readiness Light” in
the Index.
3-32

Battery Warning Light Voltmeter Gage
If this light is displayed
when the engine is
running, you may have a
problem with your charging
system.
The battery display will also stay on while the key is in
RUN until the engine is started.
If the light stays on after starting the engine it could
indicate a problem with the generator drive belt, or some
other charging system problem. Have it checked right
away. Driving with this light displayed could drain
your battery.
If you must drive a short distance with this light
displayed, it helps to turn
off all your accessories, such
as the radio and the air conditioner. When your
engine is not running, but the ignition is in
RUN, this gage shows your battery’s state of charge in
DC volts.
When the engine is running, the gage shows the
condition of the charging system. Readings between the
low and high warning zones indicate the normal
operating range.
Readings in the low warning zone may occur when a
large number
of electrical accessories are operating in
the vehicle and the engine is left at an idle for an
extended period. This condition
is normal since the
charging system is not able to provide full power
at engine idle.
As engine speeds are increased, this
condition should correct itself as higher engine speeds
allow the charging system to create maximum power.
3-33

You can only drive for a short time with the reading in
either warning zone.
If you must drive, turn off all
unnecessary accessories.
Readings in either warning zone indicate a possible
problem in the electrical system. Have the vehicle
serviced as soon as possible.
Brake System Warning Light
With the ignition on, the brake system warning light will
flash when you set the parking brake. The light will
flash
if the parking brake doesn’t release fully. If you try
to drive with the parking brake engaged, a chime
will sound when the vehicle speed is greater than
3 mph (5 km/h).
Your vehicle’s hydraulic brake system is divided into two
parts.
If one part isn’t working, the other part can still
work and stop you. For good braking, though, you need
both parts working well.
If the warning light comes on and a chime sounds there
could be a brake problem. Have your brake system
inspected right away.
I BRAKE I
-
United States Canada
This light should come on briefly when you turn the
ignition key
to RUN. If it doesn’t come on then, have it
fixed
so it will be ready to warn you if there’s a problem.
If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder
to push. Or, the pedal may go closer to the
floor. It may take longer
to stop. If the light is still on,
have the vehicle towed for service. See Towing
Your Vehicle on page 4-45.
3-34

Your brake system may not be working
properly
if the brake system warning light is
on. Driving with the brake system warning light
on can lead to an accident.
If the light is still
on after you’ve pulled
off the road and stopped
carefully, have the vehicle towed for service.
~
Anti-Lock Brake System Warning
Light
With the anti-lock brake
system, this light will come
on when you start your
engine and may stay on for
several seconds. That’s
normal.
, I
If the light doesn’t come on then, have it fixed so it will
be ready to warn you
if there is a problem.
If the light stays on, or comes on when you’re driving,
your vehicle needs service.
You will also hear a
chime sound when the light
is on steady. If the regular
brake system warning light isn’t on, you still have
brakes, but you don’t have anti-lock brakes. If the
regular brake system warning light is also on you don’t
have anti-lock brakes and there’s a problem with
your regular brakes.
In addition to both lights, you will
also hear a chime sound on the first occurrence of
a problem and each time the car is shut
off and then
restarted. See
Brake System Warning Light on
page 3-34 earlier in this section.
3-35