
SAFETY275
Operation:
The horn will chirp once when the selected pres -
sure is reached to let the user know when to
stop inflating or deflating the tire.
The horn will chirp three times if the tire is over -
inflated or over deflated and will continue to
chirp every five seconds if the user continues to
inflate or deflate the tire.
The horn will chirp once again when enough air
is added or removed to reach proper selected
pressure level.
Tire Pressure Information System (TPIS)
3500/4500/5500 Series Trucks
Your vehicle may be equipped with a Tire Pressure
Information System (TPIS).
The Tire Pressure Information System (TPIS) uses
wireless technology with wheel rim mounted
electronic sensors to transmit tire pressure levels.
Sensors mounted to each wheel as part of the
valve stem transmit tire pressure readings to the
receiver module.
NOTE:It is particularly important for you to check the tire
pressure in all of the tires on your vehicle monthly
and to maintain the proper pressure. The TPIS consists of the following components:
Receiver module
Four TPMS sensors (Single Rear Wheel (SRW)
applications)
Six TPMS sensors (Dual Rear Wheel (DRW)
applications)
Pressure display in the instrument cluster
The TPIS will display all four (Single Rear Wheel
(SRW) applications) or six (Dual Rear Wheel (DRW)
applications) tire pressure values in the instrument
cluster display.
If a system fault is detected, the instrument cluster
will display a "SERVICE TPM SYSTEM" message for
a minimum of five seconds and then display
dashes (- -) in place of the pressure value to
indicate which sensor is not being received.
If the ignition switch is cycled, this sequence will
repeat, providing the system fault still exists. If the
system fault no longer exists, the "SERVICE TPM
SYSTEM" message will no longer be displayed, and
a pressure value will display in place of the dashes.
A system fault can occur due to any of the
following:
Signal interference due to electronic devices or
driving next to facilities emitting the same radio
frequencies as the TPMS sensors.
Installing aftermarket window tinting that
contains materials that may block radio wave
signals.
Accumulation of snow or ice around the wheels
or wheel housings.
Using tire chains on the vehicle.
Using wheels/tires not equipped with TPMS
sensors.
OCCUPANT RESTRAINT SYSTEMS
Some of the most important safety features in your
vehicle are the restraint systems:
OCCUPANT RESTRAINT SYSTEMS
F
EATURES
Seat Belt Systems
Supplemental Restraint Systems (SRS) Air Bags
Child Restraints
Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on others. If
you are not sure, ask an authorized dealer.
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SAFETY283
Switchable Automatic Locking Retractors
(ALR) — If Equipped
The seat belts in the passenger seating positions
may be equipped with a Switchable Automatic
Locking Retractor (ALR) which is used to secure a
child restraint system Ú page 300.
The figures below illustrate the locking feature for
each seating position.
Regular Cab Automatic Locking Retractor (ALR) Locations Crew Cab Automatic Locking Retractor (ALR) Locations
If the passenger seating position is equipped with
an ALR and is being used for normal usage, only
pull the seat belt webbing out far enough to
comfortably wrap around the occupant’s
mid-section so as to not activate the ALR. If the ALR
is activated, you will hear a clicking sound as the
seat belt retracts. Allow the webbing to retract
completely in this case and then carefully pull out
only the amount of webbing necessary to
comfortably wrap around the occupant’s
mid-section. Slide the latch plate into the buckle
until you hear a "click."
In Automatic Locking Mode, the shoulder belt is
automatically pre-locked. The seat belt will still
retract to remove any slack in the shoulder belt.
Use the Automatic Locking Mode anytime a child restraint is installed in a seating position that has
a seat belt with this feature. Children 12 years old
and under should always be properly restrained in
the rear seat of a vehicle with a rear seat.
How To Engage The Automatic Locking Mode
1. Buckle the combination lap and shoulder
belt.
2. Grab the shoulder portion and pull downward until the entire seat belt is extracted.
3. Allow the seat belt to retract. As the seat belt retracts, you will hear a clicking sound. This
indicates the seat belt is now in the Automatic
Locking Mode.
ALR — Switchable Automatic Locking Retractor
ALR — Switchable Automatic Locking Retractor
WARNING!
Never place a rear-facing child restraint in
front of an air bag. A deploying passenger
front air bag can cause death or serious injury
to a child 12 years or younger, including a
child in a rear-facing child restraint.
Never install a rear-facing child restraint in the
front seat of a vehicle. Only use a rear-facing
child restraint in the rear seat. If the vehicle
does not have a rear seat, do not transport a
rear-facing child restraint in that vehicle.
6
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284SAFETY
How To Disengage The Automatic Locking Mode
Unbuckle the combination lap/shoulder belt and
allow it to retract completely to disengage the
Automatic Locking Mode and activate the vehicle
sensitive (emergency) locking mode.
SUPPLEMENTAL RESTRAINT SYSTEMS
(SRS)
Some of the safety features described in this
section may be standard equipment on some
models, or may be optional equipment on others. If
you are not sure, ask an authorized dealer. The air bag system must be ready to protect you in
a collision. The Occupant Restraint Controller
(ORC) monitors the internal circuits and
interconnecting wiring associated with the
electrical Air Bag System Components. Your
vehicle may be equipped with the following Air Bag
System Components:
Air Bag System Components
Occupant Restraint Controller (ORC)
Air Bag Warning Light
Steering Wheel and Column
Instrument Panel
Knee Impact Bolsters
Driver and Front Passenger Air Bags
Seat Belt Buckle Switch
Supplemental Side Air Bags — If Equipped
Front and Side Impact Sensors — If Equipped
Seat Belt Pretensioners — If Equipped
Air Bag Warning Light
The Occupant Restraint Controller (ORC)
monitors the readiness of the electronic
parts of the air bag system whenever the
ignition switch is in the START or ON/RUN
position. If the ignition switch is in the OFF position
or in the ACC position, the air bag system is not on
and the air bags will not inflate. The ORC contains a backup power supply system
that may deploy the air bag system even if the
battery loses power or it becomes disconnected
prior to deployment.
The ORC turns on the Air Bag Warning Light in the
instrument panel for approximately four to eight
seconds for a self-check when the ignition switch is
first in the ON/RUN position. After the self-check,
the Air Bag Warning Light will turn off. If the ORC
detects a malfunction in any part of the system, it
turns on the Air Bag Warning Light, either
momentarily or continuously. A single chime will
sound to alert you if the light comes on again after
initial startup.
The ORC also includes diagnostics that will
illuminate the instrument panel Air Bag Warning
Light if a malfunction is detected that could affect
the air bag system. The diagnostics also record the
nature of the malfunction. While the air bag system
is designed to be maintenance free, if any of the
following occurs, have an authorized dealer
service the air bag system immediately.The Air Bag Warning Light does not come on
during the four to eight seconds when the igni
-
tion switch is first in the ON/RUN position.
The Air Bag Warning Light remains on after the
four to eight-second interval.
The Air Bag Warning Light comes on intermit -
tently or remains on while driving.
WARNING!
The seat belt assembly must be replaced if the
switchable Automatic Locking Retractor (ALR)
feature or any other seat belt function is not
working properly when checked according to
the procedures in the Service Manual.
Failure to replace the seat belt assembly
could increase the risk of injury in collisions.
Do not use the Automatic Locking Mode to
restrain occupants who are wearing the seat
belt or children who are using booster seats.
The locked mode is only used to install
rear-facing or forward-facing child restraints
that have a harness for restraining the child.
22_DPF_OM_EN_USC_t.book Page 284

288SAFETY
(Continued)
Side Impacts
The Side Air Bags are designed to activate in
certain side impacts. The Occupant Restraint
Controller (ORC) determines whether the
deployment of the Side Air Bags in a particular
impact event is appropriate, based on the severity
and type of collision. The side impact sensors aid
the ORC in determining the appropriate response
to impact events. The system is calibrated to
deploy the Side Air Bags on the impact side of the
vehicle during impacts that require Side Air Bag
occupant protection. In side impacts, the Side Air
Bags deploy independently; a left side impact deploys the left Side Air Bags only and a right-side
impact deploys the right Side Air Bags only. Vehicle
damage by itself is not a good indicator of whether
or not Side Air Bags should have deployed.
The Side Air Bags will not deploy in all side
collisions, including some collisions at certain
angles, or some side collisions that do not impact
the area of the passenger compartment. The Side
Air Bags may deploy during angled or offset frontal
collisions where the front air bags deploy.
Side Air Bags are a supplement to the seat belt
restraint system. Side Air Bags deploy in less time
than it takes to blink your eyes.
WARNING!
Do not mount equipment, or stack luggage or
other cargo up high enough to block the
deployment of the SABICs. The trim covering
above the side windows where the SABIC and
its deployment path are located should
remain free from any obstructions.
In order for the SABICs to work as intended, do
not install any accessory items in your vehicle
which could alter the roof. Do not add an after
-
market sunroof to your vehicle. Do not add
roof racks that require permanent attach -
ments (bolts or screws) for installation on the
vehicle roof. Do not drill into the roof of the
vehicle for any reason.
WARNING!
Occupants, including children, who are up
against or very close to Side Air Bags can be
seriously injured or killed. Occupants,
including children, should never lean on or
sleep against the door, side windows, or area
where the side air bags inflate, even if they are
in an infant or child restraint.
Seat belts (and child restraints where appro -
priate) are necessary for your protection in all
collisions. They also help keep you in position,
away from an inflating Side Air Bag. To get the
best protection from the Side Air Bags, occu -
pants must wear their seat belts properly and
sit upright with their backs against the seats.
Children must be properly restrained in a child
restraint or booster seat that is appropriate for
the size of the child.
WARNING!
Side Air Bags need room to inflate. Do not lean
against the door or window. Sit upright in the
center of the seat.
Being too close to the Side Air Bags during
deployment could cause you to be severely
injured or killed.
Relying on the Side Air Bags alone could lead
to more severe injuries in a collision. The Side
Air Bags work with your seat belt to restrain
you properly. In some collisions, Side Air Bags
won’t deploy at all. Always wear your seat belt
even though you have Side Air Bags.
WARNING!
22_DPF_OM_EN_USC_t.book Page 288

SAFETY299
Center Seat LATCH
Regular Cab or Crew Cab Full Bench Rear Seat: No
Lower Center LATCH Anchorages Available
Crew Cab Split Bench Rear Seat: Center LATCH
Anchorages Available
If a child restraint installed in the center position
blocks the seat belt webbing or buckle for the
outboard position, do not use that outboard
position. If a child seat in the center position blocks
the outboard LATCH anchors or seat belt, do not
install a child seat in that outboard position. Always follow the directions of the child restraint
manufacturer when installing your child restraint.
Not all child restraint systems will be installed as
described here.
To Install A LATCH-Compatible Child
Restraint
If the selected seating position has a Switchable
Automatic Locking Retractor (ALR) seat belt, stow
the seat belt, following the instructions below. See
Ú
page 300 to check what type of seat belt each
seating position has.
1. Loosen the adjusters on the lower straps and on the tether strap of the child seat so that
you can more easily attach the hooks or
connectors to the vehicle anchorages.
2. Place the child seat between the lower anchorages for that seating position. If the
second row seat can be reclined, you may
recline the seat and/or raise the head restraint
(if adjustable) to get a better fit. If the rear seat
can be moved forward and rearward in the
vehicle, you may wish to move it to its
rear-most position to make room for the child
seat. You may also move the front seat forward
to allow more room for the child seat.
3. Attach the lower hooks or connectors of the child restraint to the lower anchorages in the
selected seating position. 4. If the child restraint has a tether strap, connect
it to the top tether anchorage. See
Úpage 303 for directions to attach a tether
anchor.
5. Tighten all of the straps as you push the child restraint rearward and downward into the
seat. Remove slack in the straps according to
the child restraint manufacturer’s instructions.
6. Test that the child restraint is installed tightly by pulling back and forth on the child seat at
the belt path. It should not move more than
1 inch (25.4 mm) in any direction.
How To Stow An Unused Switchable-ALR
(ALR) Seat Belt:
When using the LATCH attaching system to install
a child restraint, stow all ALR seat belts that are not
being used by other occupants or being used to
secure child restraints. An unused belt could injure
a child if they play with it and accidentally lock the
seat belt retractor. Before installing a child
restraint using the LATCH system, buckle the seat
belt behind the child restraint and out of the child’s
reach. If the buckled seat belt interferes with the
child restraint installation, instead of buckling it
behind the child restraint, route the seat belt
through the child restraint belt path and then
buckle it. Do not lock the seat belt. Remind all
children in the vehicle that the seat belts are not
toys and that they should not play with them.
WARNING!
Do not install a child restraint in the center
position using the LATCH system. This position
is not approved for installing child seats using
the LATCH attachments. You must use the
seat belt and tether anchor to install a child
seat in the center seating position.
Never use the same lower anchorage to attach
more than one child restraint. For typical instal -
lation instructions, see
Ú
page 299.
WARNING!
Never use the same lower anchorage to attach
more than one child restraint. For typical
installation instructions, see Ú page 299.
6
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300SAFETY
(Continued)
Installing Child Restraints Using The
Vehicle Seat Belt
Child restraint systems are designed to be secured
in vehicle seats by lap belts or the lap belt portion
of a lap/shoulder belt. Regular Cab
The seat belts in the passenger seating positions
are equipped with a Switchable Automatic Locking
Retractor (ALR) that is designed to keep the lap
portion of the seat belt tight around the child
restraint so that it is not necessary to use a locking
clip. The ALR retractor can be “switched” into a
locked mode by pulling all of the webbing out of the
retractor and then letting the webbing retract back
into the retractor. If it is locked, the ALR will make
a clicking noise while the webbing is pulled back
into the retractor.
Crew Cab
The seat belts in the passenger seating positions
are equipped with either a Switchable Automatic
Locking Retractor (ALR) or a cinching latch plate or
both. Both types of seat belts are designed to keep
the lap portion of the seat belt tight around the
child restraint so that it is not necessary to use a
locking clip. The ALR retractor can be “switched”
into a locked mode by pulling all of the webbing out
of the retractor and then letting the webbing
retract back into the retractor. If it is locked, the
ALR will make a clicking noise while the webbing is pulled back into the retractor. The cinching latch
plate is designed to hold the lap portion of the seat
belt tight when webbing is pulled tight and straight
through a child restraint’s belt path.
See the “Automatic Locking Mode” description
Ú
page 283 for additional information on ALR.
Please see the table below and the following
sections for more information.
Lap/Shoulder Belt Systems For Installing
Child Restraints In This Vehicle
Regular Cab Automatic Locking Retractor (ALR) Locations
WARNING!
Improper installation of a child restraint to the
LATCH anchorages can lead to failure of the
restraint. The child could be badly injured or
killed. Follow the child restraint manufac -
turer’s directions exactly when installing an
infant or child restraint.
Child restraint anchorages are designed to
withstand only those loads imposed by
correctly-fitted child restraints. Under no
circumstances are they to be used for adult
seat belts, harnesses, or for attaching other
items or equipment to the vehicle.
WARNING!
Improper installation or failure to properly
secure a child restraint can lead to failure of
the restraint. The child could be badly injured
or killed.
Follow the child restraint manufacturer’s
directions exactly when installing an infant or
child restraint.
WARNING!
ALR — Switchable Automatic Locking Retractor
Top Tether Anchorage Symbol
22_DPF_OM_EN_USC_t.book Page 300

SAFETY301
Crew Cab Automatic Locking Retractor (ALR) Locations
Cinching Latch plate — Cinching Latch plate
ALR — Switchable Automatic Locking Retractor Top Tether Anchorage Symbol
Frequently Asked Questions About Installing Child Restraints With Seat Belts
What is the weight limit (child’s weight + weight of the child
restraint) for using the Tether Anchor with the seat belt to attach
a forward facing child restraint? Weight limit of the Child
Restraint Always use the tether anchor when using the seat belt to
install a forward facing child restraint, up to the recommended
weight limit of the child restraint.
Can the rear-facing child restraint touch the back of the front
passenger seat? YesContact between the front passenger seat and the child
restraint is allowed, if the child restraint manufacturer also
allows contact.
Can the rear head restraints be removed? YesThe head restraints can be removed in every rear seating
position if they interfere with the installation of the child
restraint Ú
page 35.
Can the buckle stalk be twisted to tighten the seat belt against
the belt path of the child restraint? Yes – Cinching Latch Plate
No – ALR In positions with cinching latch plates (CINCH), the buckle
stalk may be twisted up to 3 full turns. Do not twist the buckle
stalk in a seating position with an ALR retractor.
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302SAFETY
Installing A Child Restraint With A
Switchable Automatic Locking Retractor
(ALR):
Child restraint systems are designed to be secured
in vehicle seats by lap belts or the lap belt portion
of a lap/shoulder belt.
1. For Crew Cab Models
Place the child seat in the center of the seating
position. If the second row seat can be re -
clined, you may recline the seat and/or raise
the head restraint (if adjustable) to get a better
fit. If the rear seat can be moved forward and
rearward in the vehicle, you may wish to move
it to its rear-most position to make room for the
child seat. You may also move the front seat
forward to allow more room for the child seat. For Regular Cab Models
Place the child seat in the center of the seating
position. Move the vehicle seat as far rearward
as possible to keep the child as far from the
passenger air bag as possible.
2. Pull enough of the seat belt webbing from the retractor to pass it through the belt path of the
child restraint. Do not twist the belt webbing in
the belt path.
3. Slide the latch plate into the buckle until you hear a “click.”
4. Pull on the webbing to make the lap portion tight against the child seat.
5. To lock the seat belt, pull down on the shoulder part of the belt until you have pulled all the
seat belt webbing out of the retractor. Then,
allow the webbing to retract back into the
retractor. As the webbing retracts, you will hear
a clicking sound. This means the seat belt is
now in the Automatic Locking mode.
6. Try to pull the webbing out of the retractor. If it is locked, you should not be able to pull out any
webbing. If the retractor is not
locked, repeat
step 5.
7. Finally, pull up on any excess webbing to tighten the lap portion around the child
restraint while you push the child restraint
rearward and downward into the vehicle seat. 8. If the child restraint has a top tether strap and
the seating position has a top tether
anchorage, connect the tether strap to the
anchorage and tighten the tether strap. See
Úpage 303 for directions to attach a tether
anchor.
9. Test that the child restraint is installed tightly by pulling back and forth on the child seat at
the belt path. It should not move more than
1 inch (25.4 mm) in any direction.
Any seat belt system will loosen with time, so check
the belt occasionally, and pull it tight if necessary.
Installing A Child Restraint With A Cinching
Latch Plate (CINCH) — If Equipped:
Child restraint systems are designed to be secured
in vehicle seats by lap belts or the lap belt portion
of a lap/shoulder belt.
WARNING!
Improper installation or failure to properly
secure a child restraint can lead to failure of
the restraint. The child could be badly injured
or killed.
Follow the child restraint manufacturer’s
directions exactly when installing an infant or
child restraint.
WARNING!
Improper installation or failure to properly
secure a child restraint can lead to failure of
the restraint. The child could be badly injured
or killed.
Follow the child restraint manufacturer’s
directions exactly when installing an infant or
child restraint.
22_DPF_OM_EN_USC_t.book Page 302