RAM CHASSIS CAB 2021 Owners Manual
Manufacturer: RAM, Model Year: 2021, Model line: CHASSIS CAB, Model: RAM CHASSIS CAB 2021Pages: 463, PDF Size: 21.5 MB
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SAFETY299
7. Position the lap belt so that it is snug and 
lies low across your hips, below your 
abdomen. To remove slack in the lap 
belt portion, pull up on the shoulder belt.
To loosen the lap belt if it is too tight, pull on 
the lap belt. A snug seat belt reduces the 
risk of sliding under the seat belt in a 
collision.
8. Position the shoulder belt on your chest so  that it is comfortable and not resting on your 
neck. The retractor will withdraw any slack 
in the seat belt.
9. To release the seat belt, push the red button  on the buckle.
10. To disengage the mini-latch plate from the  mini-buckle for storage, insert the regular 
latch plate into the center red slot on the 
mini-buckle. The seat belt will automatically 
retract to its stowed position. If necessary, 
slide the latch plate down the webbing to 
allow the seat belt to retract fully. Insert the 
mini-latch plate and regular latch plate into 
its stowed position.
 Detaching Mini-Buckle With Seat Belt Tongue
First Row Center Lap Belt Operating 
Instructions — If Equipped
The center seating position for the Crew Cab 
front seat has a lap belt only. To buckle the lap 
belt, slide the latch plate into the buckle until 
you hear a "click." To lengthen the lap belt, tilt 
the latch plate and pull.
To remove slack, pull the loose end of the 
webbing. Wear the lap belt snug against the 
hips. Sit back and upright in the seat, then 
adjust the seat belt as tightly as is comfortable.
Seat Belt Extender 
If a seat belt is not long enough to fit properly, 
even when the webbing is fully extended and 
the adjustable upper shoulder belt anchorage 
(if equipped) is in its lowest position, an 
authorized dealer can provide you with a Seat 
Belt Extender. The Seat Belt Extender should be 
used only if the existing seat belt is not long 
enough. When the Seat Belt Extender is not 
required for a different occupant, it must be 
removed.
WARNING!
If the mini-latch plate and mini-buckle are 
not properly connected when the seat belt 
is used by an occupant, the seat belt will 
not be able to provide proper restraint and 
will increase the risk of injury in a collision.
When reattaching the mini-latch plate and 
mini-buckle, ensure the seat belt webbing 
is not twisted. If the webbing is twisted, 
follow the preceding procedure to detach 
the mini-latch plate and mini-buckle, 
untwist the webbing, and reattach the 
mini-latch plate and mini-buckle.
6
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300SAFETY  
Seat Belts And Pregnant Women 
Seat Belts and Pregnant Women
Seat belts must be worn by all occupants 
including pregnant women: the risk of injury in 
the event of an accident is reduced for the 
mother and the unborn child if they are wearing 
a seat belt.
Position the lap belt snug and low below the 
abdomen and across the strong bones of the 
hips. Place the shoulder belt across the chest 
and away from the neck. Never place the 
shoulder belt behind the back or under the arm.
Seat Belt Pretensioner — If Equipped
3500 Models Only
The front outboard seat belt system is equipped 
with pretensioning devices that are designed to 
remove slack from the seat belt in the event of 
a collision. These devices may improve the 
performance of the seat belt by removing 
slack from the seat belt early in a collision. 
Pretensioners work for all size occupants, 
including those in child restraints.
NOTE:
These devices are not a substitute for proper 
seat belt placement by the occupant. The seat 
belt still must be worn snugly and positioned 
properly.
The pretensioners are triggered by the 
Occupant Restraint Controller (ORC). Like the 
air bags, the pretensioners are single use items. 
A deployed pretensioner or a deployed air bag 
must be replaced immediately.WARNING!
ONLY use a Seat Belt Extender if it is physi -
cally required in order to properly fit the 
original seat belt system. DO NOT USE the 
Seat Belt Extender if, when worn, the 
distance between the front edge of the 
Seat Belt Extender buckle and the center of 
the occupant’s body is LESS than 6 inches.
Using a Seat Belt Extender when not needed 
can increase the risk of serious injury or 
death in a collision. Only use the Seat Belt 
Extender when the lap belt is not long 
enough and only use in the recommended 
seating positions. Remove and store the 
Seat Belt Extender when not needed.
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SAFETY301
Energy Management Feature — If 
Equipped
3500 Models Only
The front outboard seat belt system is equipped 
with an Energy Management feature that may 
help further reduce the risk of injury in the event 
of a collision. The seat belt system has a 
retractor assembly that is designed to release 
webbing in a controlled manner.
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  
Úpage 322.
The figure below illustrates 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.ALR — Switchable Automatic Locking Retractor
ALR — Switchable Automatic Locking Retractor
6
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302SAFETY  
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. 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
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.
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.
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SAFETY303
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 
ignition 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.
NOTE:
If the speedometer, tachometer, or any engine 
related gauges are not working, the Occupant 
Restraint Controller (ORC) may also be disabled. 
In this condition the air bags may not be ready to 
inflate for your protection. Have an authorized 
dealer service the air bag system immediately.
Redundant Air Bag Warning Light 
If a fault with the Air Bag Warning 
Light is detected, which could affect 
the Supplemental Restraint System 
(SRS), the Redundant Air Bag Warning 
Light will illuminate on the instrument panel. 
The Redundant Air Bag Warning Light will
stay on until the fault is cleared. In addition, a 
single chime will sound to alert you that the 
Redundant Air Bag Warning Light has come on 
and a fault has been detected. If the Redundant 
Air Bag Warning Light comes on intermittently or 
remains on while driving have an authorized 
dealer service the vehicle immediately  
Ú page 107.
WARNING!
Ignoring the Air Bag Warning Light in your 
instrument panel could mean you won’t have 
the air bag system to protect you in a collision. 
If the light does not come on as a bulb check 
when the ignition is first turned on, stays on 
after you start the vehicle, or if it comes on as 
you drive, have an authorized dealer service 
the air bag system immediately.
6
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304SAFETY  
Front Air Bags
This vehicle has front air bags and lap/shoulder 
belts for both the driver and front passenger.
The front air bags are a supplement to the seat 
belt restraint systems. The driver front air bag
is mounted in the center of the steering wheel. 
The passenger front air bag is mounted in the 
instrument panel, above the glove compartment. 
The words “SRS AIRBAG” or “AIRBAG” are 
embossed on the air bag covers.
Front Air Bag/Knee Bolster Locations
Driver And Passenger Front Air Bag 
Features
The Advanced Front Air Bag system has 
multistage driver and front passenger air bags. 
This system provides output appropriate to the 
severity and type of collision as determined by 
the Occupant Restraint Controller (ORC), which 
may receive information from the front impact 
sensors (if equipped) or other system 
components.
The first stage inflator is triggered immediately 
during an impact that requires air bag 
deployment. A low energy output is used in less 
severe collisions. A higher energy output is used 
for more severe collisions.
This vehicle may be equipped with a driver and/
or front passenger seat belt buckle switch that 
detects whether the driver or front passenger 
seat belt is buckled. The seat belt buckle switch 
may adjust the inflation rate of the Advanced 
Front Air Bags.
1 — Driver And Passenger Front Air Bags
2 — Driver And Passenger Knee Impact Bolsters
WARNING!
Being too close to the steering wheel or 
instrument panel during front air bag 
deployment could cause serious injury, 
including death. Air bags need room to 
inflate. Sit back, comfortably extending 
your arms to reach the steering wheel or 
instrument panel.
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.
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SAFETY305
Front Air Bag Operation 
Front Air Bags are designed to provide additional 
protection by supplementing the seat belts. Front 
air bags are not expected to reduce the risk of 
injury in rear, side, or rollover collisions. The front 
air bags will not deploy in all frontal collisions, 
including some that may produce substantial 
vehicle damage — for example, some pole 
collisions, truck underrides, and angle offset 
collisions.
On the other hand, depending on the type and 
location of impact, front air bags may deploy in 
crashes with little vehicle front-end damage but 
that produce a severe initial deceleration.
Because air bag sensors measure vehicle 
deceleration over time, vehicle speed and 
damage by themselves are not good indicators 
of whether or not an air bag should have 
deployed.
Seat belts are necessary for your protection in 
all collisions, and also are needed to help keep 
you in position, away from an inflating air bag.
 When the Occupant Restraint Controller (ORC) 
detects a collision requiring the front air bags, it 
signals the inflator units. A large quantity of 
non-toxic gas is generated to inflate the front air 
bags.
The steering wheel hub trim cover and the 
upper passenger side of the instrument panel 
separate and fold out of the way as the air bags 
inflate to their full size. The front air bags fully 
inflate in less time than it takes to blink your 
eyes. The front air bags then quickly deflate 
while helping to restrain the driver and front 
passenger.
Knee Impact Bolsters 
The Knee Impact Bolsters help protect the 
knees of the driver and front passenger, and 
position the front occupants for improved 
interaction with the front air bags.
WARNING!
No objects should be placed over or near 
the air bag on the instrument panel or 
steering wheel because any such objects 
could cause harm if the vehicle is in a colli
-
sion severe enough to cause the air bag to 
inflate.
Do not put anything on or around the air bag 
covers or attempt to open them manually. 
You may damage the air bags and you could 
be injured because the air bags may no 
longer be functional. The protective covers 
for the air bag cushions are designed to open 
only when the air bags are inflating.
Relying on the air bags alone could lead to 
more severe injuries in a collision. The air 
bags work with your seat belt to restrain you 
properly. In some collisions, air bags won’t 
deploy at all. Always wear your seat belts 
even though you have air bags.
WARNING!
Do not drill, cut, or tamper with the knee 
impact bolsters in any way.
Do not mount any accessories to the knee 
impact bolsters such as alarm lights, 
stereos, citizen band radios, etc.
6
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306SAFETY  
Supplemental Side Air Bags
Supplemental Seat-Mounted Side Air Bags 
(SABs) — If Equipped
Your vehicle may be equipped with 
Supplemental Seat-Mounted Side Air Bags 
(SABs). If your vehicle is equipped with 
Supplemental Seat-Mounted Side Air Bags 
(SABs), please refer to the information below.
Supplemental Seat-Mounted Side Air Bags 
(SABs) are located in the outboard side of the 
front seats. The SABs are marked with “SRS 
AIRBAG” or “AIRBAG” on a label or on the seat 
trim on the outboard side of the seats.
Supplemental Seat-Mounted Side Air Bag Label
 The SABs (if equipped with SABs) may help to 
reduce the risk of occupant injury during certain 
side impacts, in addition to the injury reduction 
potential provided by the seat belts and body 
structure.
When the SAB deploys, it opens the seam on 
the outboard side of the seatback’s trim cover. 
The inflating SAB deploys through the seat 
seam into the space between the occupant and 
the door. The SAB moves at a very high speed 
and with such a high force that it could injure 
occupants if they are not seated properly, or if 
items are positioned in the area where the SAB 
inflates. Children are at an even greater risk of 
injury from a deploying air bag.
Supplemental Side Air Bag Inflatable Curtains 
(SABICs) — If Equipped
Your vehicle may be equipped with 
Supplemental Side Air Bag Inflatable Curtains 
(SABICs). If your vehicle is equipped with 
Supplemental Side Air Bag Inflatable Curtains 
(SABICs), please refer to the information below.
Supplemental Side Air Bag Inflatable Curtains 
(SABICs) are located above the side windows. 
The trim covering the SABICs is labeled “SRS 
AIRBAG” or “AIRBAG.”
Supplemental Side Air Bag Inflatable Curtain (SABIC)  Label Location
WARNING!
Do not use accessory seat covers or place 
objects between you and the Side Air Bags; 
the performance could be adversely affected 
and/or objects could be pushed into you, 
causing serious injury.
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SAFETY307
SABICs (if equipped with SABICs) may help 
reduce the risk of head and other injuries to 
front and rear seat outboard occupants in 
certain side impacts, in addition to the injury 
reduction potential provided by the seat belts 
and body structure.
The SABIC deploys downward, covering the side 
windows. An inflating SABIC pushes the outside 
edge of the headliner out of the way and covers 
the window. The SABICs inflate with enough 
force to injure occupants if they are not belted 
and seated properly, or if items are positioned 
in the area where the SABICs inflate. Children 
are at an even greater risk of injury from a 
deploying air bag.
The SABICs (if equipped with SABICs) may help 
reduce the risk of partial or complete ejection of 
vehicle occupants through side windows in 
certain side impact events. 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 aftermarket sunroof to your vehicle. 
Do not add roof racks that require perma
-
nent attachments (bolts or screws) for 
installation on the vehicle roof. Do not drill 
into the roof of the vehicle for any reason.
6
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308SAFETY  
NOTE:
Air bag covers may not be obvious in the interior 
trim, but they will open during air bag deployment.
 Rollover Events (If Equipped With Rollover 
Sensing)
Side Air Bags and seat belt pretensioners 
(if equipped) are designed to activate in certain 
rollover events (if equipped with rollover 
sensing). The Occupant Restraint Controller 
(ORC) determines whether deployment in a 
particular rollover event is appropriate, based 
on the severity and type of collision. Vehicle 
damage by itself is not a good indicator of 
whether or not Side Air Bags and seat belt 
pretensioners should have deployed.
The Side Air Bags and seat belt pretensioners will 
not deploy in all rollover events. The rollover 
sensing system determines if a rollover event 
may be in progress and whether deployment is 
appropriate. In the event the vehicle experiences 
a rollover or near rollover event, and deployment 
is appropriate, the rollover sensing system 
will deploy the Side Air Bags and seat belt 
pretensioners on both sides of the vehicle.
The SABICs may help reduce the risk of partial 
or complete ejection of vehicle occupants 
through side windows in certain rollover or side 
impact events.
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 
appropriate) are necessary for your protec
-
tion 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, occupants 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.
21_DPF_OM_EN_USC_t.book  Page 308