2007 GMC SIERRA CLASSIC air condition
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Never put a rear facing child restraint in the right
front passenger seat unless the airbag is off.
Here is why:
{CAUTION:
A child in a rear-facing child restraint can
be seriously injured or killed if the right
front passenger’s airbag in ates. This is
because the back of the rear-facing child
restraint would be very close to the
in ating airbag. Be sure the airbag is off
before using a rear-facing child restraint
in the right front seat position.
CAUTION: (Continued)
CAUTION: (Continued)
Even though the passenger sensing
system or airbag off switch are designed
to turn off the passenger’s frontal airbag
under certain conditions, no system is
fail-safe, and no one can guarantee that
an airbag will not deploy under some
unusual circumstance, even though it is
turned off. General Motors recommends
that rear-facing child restraints be
transported in vehicles with a rear seat
that will accommodate a rear-facing child
restraint, whenever possible.
If you need to secure a forward-facing
child restraint in the right front seat,
always move the front passenger seat as
far back as it will go. It is better to secure
the child restraint in a rear seat.
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In any particular crash, no one can say whether
an airbag should have in ated simply because
of the damage to a vehicle or because of what the
repair costs were. In ation is determined by
what the vehicle hits, the angle of the impact, and
how quickly the vehicle slows down.
The airbag 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.
SeeOff-Road Driving on page 372for more tips
on off-road driving.Single Stage vs. Dual Stage Airbags
Depending on the weight of your vehicle, you will
have either “Single Stage Airbags” or “Dual
Stage Airbags.” Vehicles that have a passenger
sensing system also have dual stage airbags.
If the rearview mirror in your vehicle has a
passenger airbag status indicator, your vehicle
has the passenger sensing system and therefore,
it has dual stage airbags. If the rearview mirror
in your vehicle does not have a passenger airbag
status indicator, then your vehicle does not
have the passenger sensing system and it has
single stage airbags. SeePassenger Airbag Status
Indicator on page 250orPassenger Sensing
System on page 103.
Single Stage Airbags
If your vehicle has frontal airbags with single stage
deployment and your vehicle goes straight into
a wall that does not move or deform, the threshold
level is about 13 to 16 mph (20 to 25 km/h). The
threshold level can vary, however, with speci c
vehicle design, so that it can be somewhat above
or below this range.
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Page 100 of 674
Airbag Off Switch
If your instrument panel has one of the switches
pictured in the following illustrations, your
vehicle has an airbag off switch that you can use
to manually turn off the right front passenger’s
airbag.This switch should only be turned to the off
position if the person in the right front passenger’s
position is a member of a passenger risk group
identi ed by the national government as follows:
Infant.An infant (less than 1 year old)
must ride in the front seat because:
my vehicle has no rear seat;
my vehicle has a rear seat too small to
accommodate a rear-facing infant seat; or
the infant has a medical condition which,
according to the infant’s physician, makes
it necessary for the infant to ride in the front
seat so that the driver can constantly
monitor the child’s condition.
United StatesCanada
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Child age 1 to 12.A child age 1 to 12 must
ride in the front seat because:
my vehicle has no rear seat;
although children ages 1 to 12 ride in the rear
seat(s) whenever possible, children
ages 1 to 12 sometimes must ride in the front
because no space is available in the rear
seat(s) of my vehicle; or
the child has a medical condition which,
according to the child’s physician, makes
it necessary for the child to ride in the front
seat so that the driver can constantly monitor
the child’s condition.
Medical Condition.A passenger has a
medical condition which, according to his or
her physician:
causes the passenger airbag to pose a
special risk for the passenger; and
makes the potential harm from the passenger
airbag in a crash greater than the potential
harm from turning off the airbag and allowing
the passenger, even if belted, to hit the
dashboard or windshield in a crash.
{CAUTION:
If the right front passenger’s airbag is
turned off for a person who is not in a risk
group identi ed by the national
government, that person will not have the
extra protection of an airbag. In a crash,
the airbag will not be able to in ate and
help protect the person sitting there. Do
not turn off the passenger’s airbag unless
the person sitting there is in a risk group.
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Page 104 of 674
The passenger sensing system will turn off the
right front passenger’s frontal airbag under certain
conditions. The driver’s airbag is not part of the
passenger sensing system.
The passenger sensing system works with
sensors that are part of the right front passenger’s
seat and safety belt. The sensors are designed
to detect the presence of a properly-seated
occupant and determine if the passenger’s frontal
airbag should be enabled (may in ate) or not.
Accident statistics show that children are safer if
they are restrained in the rear rather than the front
seat. We recommend that child restraints be
secured in a rear seat, including an infant riding in
a rear-facing infant seat, a child riding in a
forward-facing child seat and an older child riding
in a booster seat.
Your vehicle may have a label on your sun visor
that says, “Never put a rear-facing child seat in the
front.” This is because the risk to the rear-facing
child is so great, if the airbag deploys.
{CAUTION:
A child in a rear-facing child restraint can
be seriously injured or killed if the right
front passenger’s airbag in ates. This is
because the back of the rear-facing child
restraint would be very close to the
in ating airbag.
Even though the passenger sensing
system is designed to turn off the
passenger’s frontal airbag if the system
detects a rear-facing child restraint, no
system is fail-safe, and no one can
guarantee that an airbag will not deploy
under some unusual circumstance, even
though it is turned off. We recommend
that rear-facing child restraints be secured
in the rear seat, even if the airbag is off.
If you need to secure a forward-facing
child restraint in the right front seat,
always move the front passenger seat as
far back as it will go. It is better to secure
the child restraint in a rear seat.
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Q:What if I added a snow plow? Will it keep
the airbags from working properly?
A:We have designed our airbag systems to work
properly under a wide range of conditions,
including snow plowing with vehicles that have
the optional Snow Plow Prep Package
(RPO VYU). But do not change or defeat the
snow plow’s “tripping mechanism.” If you
do, it can damage your snow plow and your
vehicle, and it may cause an airbag in ation.
Q:Because I have a disability, I have to get
my vehicle modi ed. How can I nd out
whether this will affect my advanced airbag
system?
A:Changing or moving any parts of the front
seats, safety belts, the airbag sensing and
diagnostic module, steering wheel, instrument
panel, the inside review mirror, or airbag
wiring can affect the operation of the airbag
system. If you have questions, call Customer
Assistance. The phone numbers and
addresses for Customer Assistance are in
Step Two of the Customer Satisfaction
Procedure in this manual. SeeCustomer
Satisfaction Procedure on page 638.
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Page 144 of 674
MANUAL MODE (M):This position, is available
on vehicles with the Allison Transmission®.It
lets drivers select the range of gears appropriate
for current driving conditions. If your vehicle
has this feature, see Range Select Mode (Allison
Transmission
®) later in this section.
THIRD (3):This position is also used for normal
driving. However, it reduces vehicle speed
more than DRIVE (D) without using your brakes.
You might choose THIRD (3) instead of DRIVE (D)
when driving on hilly, winding roads, when
towing a trailer, so there is less shifting between
gears and when going down a steep hill.
SECOND (2):This position reduces vehicle speed
even more than THIRD (3) without using your
brakes. You can use SECOND (2) on hills. It can
help control your speed as you go down steep
mountain roads, but then you would also want to
use your brakes off and on.
If you manually select SECOND (2) in an
automatic transmission, the transmission will start
in second gear. You can use this feature for
reducing the speed of the rear wheels when you
are trying to start your vehicle from a stop on
slippery road surfaces.For an Allison Transmission
®, see Low Traction
Mode later in this section.
FIRST (1):For an automatic transmission, this
position reduces vehicle speed even more than
SECOND (2) without using your brakes. You can
use it on very steep hills, or in deep snow or mud. If
the shift lever is put in FIRST (1) while the vehicle is
moving forward, the transmission will not shift into
rst gear until the vehicle is going slowly enough.
For an Allison Transmission
®, This position reduces
vehicle speed, without using your brakes. You can
use it for major/sever downgrades and off-road
driving where the vehicle would otherwise
accelerate due to steepness of grade. When you
shift to FIRST (1) it will provide the lowest gear
appropriate to your current road speed and will
continue to downshift as the vehicle slows,
eventually downshifting to FIRST (1) gear.
Notice:Spinning the tires or holding the
vehicle in one place on a hill using only the
accelerator pedal may damage the
transmission. The repair will not be covered by
your warranty. If you are stuck, do not spin
the tires. When stopping on a hill, use the
brakes to hold the vehicle in place.
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Low Traction Mode
(Allison Transmission®)
If your vehicle has the DURAMAX®diesel engine
and the Allison Transmission®,ithasaLow
Traction Mode that assists in vehicle acceleration
when road conditions are slippery, such as
with ice or snow. While at a stop, selecting the
second gear range using the Range Selection
system, will allow the Allison Transmission
®to limit
torque to the wheels after it detects wheel slip,
preventing the tires from spinning.
Notice:Spinning the tires or holding the
vehicle in one place on a hill using only the
accelerator pedal may damage the
transmission. The repair will not be covered by
your warranty. If you are stuck, do not spin
the tires. When stopping on a hill, use the
brakes to hold the vehicle in place.
Cold Weather Operation
(Allison Transmission®)
On cold days, approximately 32°F (0°C) or colder,
your automatic transmission is designed to shift
differently. The transmission uses a warm-up mode
shift schedule until the engine reaches normal
operating temperature. While the transmission is
in warm-up mode it is normal for transmission
upshifts to be delayed or held longer. This feature
improves heater performance by giving quicker
vehicle warm-ups.
When temperatures are below−13°F (−25°C), the
transmission will prevent certain operations to
protect against damage. When active the DIC will
display the message “Trans in Warm-up”.
SeeDIC Warnings and Messages on page 270for
more information.
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