2023 RAM 1500 engine

STARTING AND OPERATING143
TO MANUALLY TURN OFF THE
S
TOP/START SYSTEM

Stop/Start OFF Switch

Push the Stop/Start OFF switch (located on the
switch bank). The light on the switch will illuminate.
The “STOP/START OFF” message will appear in the
instrument cluster display and the Autostop mode will be
disabled
Úpage 98.
NOTE:The Stop/Start system will reset itself back to the ON
position every time the ignition is turned OFF and back ON.
TO MANUALLY TURN ON THE
S
TOP/START SYSTEM
Push the Stop/Start OFF switch (located on the switch
bank). The light on the switch will turn off.
SYSTEM MALFUNCTION
If there is a malfunction in the Stop/Start system, the
system will not shut down the engine. A “SERVICE STOP/
START SYSTEM” message will appear in the instrument
cluster display
Úpage 107.
The system will need to be checked by an authorized
dealer.
CRUISE CONTROL SYSTEMS — IF EQUIPPED
Your vehicle may be equipped with the Cruise Control
system, or the Adaptive Cruise Control (ACC) system:
 Cruise Control will keep your vehicle at a constant
preset speed.
 Adaptive Cruise Control (ACC) will adjust the vehicle
speed up to the preset speed to maintain a distance
with the vehicle ahead.
NOTE:
In vehicles equipped with ACC, if ACC is not enabled,
Fixed Speed Cruise Control will not detect vehicles
directly ahead of you. Always be aware of the feature
selected.
 Only one Cruise Control feature can operate at a time.
For example, if Fixed Speed Cruise Control is enabled,
Adaptive Cruise Control will be unavailable, and vice
versa.
CRUISE CONTROL
When engaged, the Cruise Control takes over accelerator
operations at speeds greater than 20 mph (32 km/h).
The Cruise Control buttons are located on the right side of
the steering wheel.

Cruise Control Buttons

1 — SET (+)/Accel
2 — CANC/Cancel
3 — SET (-)/Decel
4 — On/Off
5 — RES/Resume
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STARTING AND OPERATING145
(Continued)
To Deactivate
A tap on the brake pedal, pushing the CANC (cancel)
button, or normal brake pressure while slowing the vehicle
will deactivate the Cruise Control system without erasing
the set speed from memory.
The following conditions will also deactivate the Cruise
Control system without erasing the set speed from
memory:
Vehicle parking brake is applied
 Stability event occurs
 Gear selector is moved out of DRIVE
 Engine overspeed occurs
Pushing the on/off button or placing the ignition in the OFF
position, erases the set speed from memory.
ADAPTIVE CRUISE CONTROL (ACC)
Adaptive Cruise Control (ACC) increases the driving
convenience provided by Cruise Control while traveling on
highways and major roadways. However, it is not a safety
system and not designed to prevent collisions. The Cruise
Control function performs differently
Úpage 143.
ACC will allow you to keep Cruise Control engaged in light
to moderate traffic conditions without the constant need
to reset your speed. ACC utilizes a radar sensor and a
forward facing camera designed to detect a vehicle
directly ahead of you to maintain a set speed.
NOTE:
 If the ACC sensor detects a vehicle ahead, ACC will
apply limited braking or acceleration (not to exceed the
original set speed) automatically to maintain a preset
following distance, while matching the speed of the
vehicle ahead.
 Any chassis/suspension or tire size modifications to
the vehicle will affect the performance of the Adaptive
Cruise Control and Forward Collision Warning system.
 Fixed Speed Cruise Control (ACC not enabled) will not
detect vehicles directly ahead of you. Always be aware
of the feature selected
Úpage 402.
WARNING!
Adaptive Cruise Control (ACC) is a convenience
system. It is not a substitute for active driver involve -
ment. It is always the driver’s responsibility to be
attentive of road, traffic, and weather conditions,
vehicle speed, distance to the vehicle ahead and,
most importantly, brake operation to ensure safe
operation of the vehicle under all road conditions.
Your complete attention is always required while
driving to maintain safe control of your vehicle.
Failure to follow these warnings can result in a colli -
sion and death or serious personal injury.
 The ACC system:
 Does not react to pedestrians, oncoming vehi -
cles, and stationary objects (e.g., a stopped
vehicle in a traffic jam or a disabled vehicle).
 Cannot take street, traffic, and weather condi -
tions into account, and may be limited upon
adverse sight distance conditions.
 Does not always fully recognize complex driving
conditions, which can result in wrong or missing
distance warnings.
 Will bring your vehicle to a complete stop while
following a vehicle ahead and hold your vehicle
for approximately three minutes in the stop posi -
tion. If the vehicle ahead does not start moving
within three minutes the parking brake will be
activated, and the ACC system will be canceled.
You should not utilize the ACC system:
 When driving in fog, heavy rain, heavy snow, sleet,
heavy traffic, and complex driving situations (i.e., in
highway construction zones).
 When entering a turn lane or highway off-ramp; when
driving on roads that are winding, icy, snow-covered,
slippery, or have steep uphill or downhill slopes.
 When towing a trailer up or down steep slopes.
 When circumstances do not allow safe driving at a
constant speed.
WARNING!
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148STARTING AND OPERATING
Resume can be used at any speed above 0 mph (0 km/h)
when ACC is active.
NOTE:
If your vehicle is at a standstill for longer than two
seconds, then the driver will either have to push the
RES (resume) button, or apply the accelerator pedal to
reengage the Adaptive Cruise Control (ACC) to the
existing set speed.
 ACC cannot be resumed if there is a stationary vehicle
in front of your vehicle in close proximity.
To Vary The Speed Setting
To Increase Or Decrease The Set Speed
After setting a speed, you can increase the set speed by
pushing the SET (+) button, or decrease speed by pushing
the SET (-) button. U.S. Speed (mph)

Pushing the SET (+), or SET (-) button once will result in
a 1 mph speed adjustment. Each subsequent tap of
the button results in an adjustment of 1 mph.
 If the button is continually pushed, the set speed will
continue to adjust in 5 mph increments until the button
is released. The new set speed is reflected in the instru -
ment cluster display.
Metric Speed (km/h)
 Pushing the SET (+), or SET (-) button once will result in
a 1 km/h speed adjustment. Each subsequent tap of
the button results in an adjustment of 1 km/h.
 If the button is continually pushed, the set speed will
continue to adjust in 10 km/h increments until the
button is released. The new set speed is reflected in
the instrument cluster display.
NOTE:When you override and push the SET (+) button or SET (-)
buttons, the new set speed will be the current speed of the
vehicle.
When ACC Is Active
 When you use the SET (-) button to decelerate, if the
engine’s braking power does not slow the vehicle suffi -
ciently to reach the set speed, the brake system will
automatically slow the vehicle. 
The ACC system decelerates the vehicle to a full stop
when following the vehicle in front. If your vehicle
follows the vehicle in front to a standstill, after two
seconds the driver will either have to push the RES
(resume) button, or apply the accelerator pedal to reen -
gage the ACC to the existing set speed.
 The ACC system maintains set speed when driving
uphill and downhill. However, a slight speed change on
moderate hills is normal. In addition, downshifting may
occur while climbing uphill or descending downhill. This
is normal operation and necessary to maintain set
speed. When driving uphill and downhill, the ACC
system will cancel if the braking temperature exceeds
normal range (overheated).
Setting The Following Distance In ACC
The specified following distance for Adaptive Cruise
Control (ACC) can be set by varying the distance setting
between four bars (longest), three bars (long), two bars
(medium) and one bar (short). Using this distance setting
and the vehicle speed, ACC calculates and sets the
distance to the vehicle ahead. This distance setting
displays in the instrument cluster display.
WARNING!
The Resume function should only be used if traffic and
road conditions permit. Resuming a set speed that is
too high or too low for prevailing traffic and road
conditions could cause the vehicle to accelerate or
decelerate too sharply for safe operation. Failure to
follow these warnings can result in a collision and death
or serious personal injury.

23_DT_OM_EN_USC_t.book Page 148

STARTING AND OPERATING171
REFUELING THE VEHICLE
The capless fuel filler is located on the left side of the
vehicle.
The capless system is sealed by two flapper doors.

1. Put the vehicle in PARK and switch the ignition off.

2. Push the center-rear edge of the fuel filler door
(3 o'clock position) and release to open.

Fuel Filler Door

3. Insert the fuel nozzle fully into the filler pipe, the nozzle opens and holds both flapper doors while
refueling.

Fuel Filler

4. When the fuel nozzle “clicks” or shuts off, the fuel tank is full.
5. Keep the nozzle in the filler for five seconds after nozzle clicks to allow fuel to drain from the nozzle.
6. Remove the fuel filler nozzle.
7. To close the fuel filler door, push the center-rear edge (3 o’clock position) of the fuel filler door and then
release. The fuel filler door will latch closed.
NOTE:In certain cold conditions, ice may prevent the fuel filler
door from opening. If this occurs, lightly push on the fuel
filler door around the perimeter to break the ice build up.
WARNING!
Never have any smoking materials lit in or near the
vehicle when the fuel door is open or the tank is
being filled.
 Never add fuel when the engine is running. This is in
violation of most state and federal fire regulations
and may cause the MIL to turn on.
 A fire may result if gasoline is pumped into a portable
container that is inside of a vehicle. You could be
burned. Always place gas containers on the ground
while filling.
CAUTION!
To avoid fuel spillage and overfilling, do not “top off” the
fuel tank after filling.
WARNING!
Always place container on the ground before filling.
 Keep the pump nozzle in contact with the container
when you are filling it.
 Use only approved containers for flammable liquid.
 Do not leave container unattended while filling.
 A static electric charge could cause a spark and
fire hazard.
4

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STARTING AND OPERATING173
TRAILER TOWING
In this section you will find safety tips and information on
limits to the type of towing you can reasonably do with your
vehicle. Before towing a trailer, carefully review this
information to tow your load as efficiently and safely as
possible.
To maintain the New Vehicle Limited Warranty coverage,
follow the requirements and recommendations in this
manual concerning vehicles used for trailer towing.
COMMON TOWING DEFINITIONS
The following trailer towing related definitions will assist
you in understanding the following information:
Gross Vehicle Weight Rating (GVWR)
The GVWR is the total allowable weight of your vehicle.
This includes driver, passengers, cargo and tongue
weight. The total load must be limited so that you do not
exceed the GVWR
Úpage 172.
Gross Trailer Weight (GTW)
The GTW is the weight of the trailer plus the weight of all
cargo, consumables and equipment (permanent or
temporary) loaded in or on the trailer in its “loaded and
ready for operation” condition.
The recommended way to measure GTW is to put your fully
loaded trailer on a vehicle scale. The entire weight of the
trailer must be supported by the scale.
Gross Combination Weight Rating (GCWR)
The GCWR is the total allowable weight of your vehicle and
trailer when weighed in combination.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum capacity of the front and rear
axles. Distribute the load over the front and rear axles
evenly. Make sure that you do not exceed either front or
rear GAWR
Úpage 172.
Tongue Weight (TW)
The TW is the downward force exerted on the hitch ball by
the trailer. You must consider this as part of the load on
your vehicle.
Trailer Frontal Area
The frontal area is the maximum height multiplied by the
maximum width of the front of a trailer.
Trailer Sway Control (TSC)
The TSC can be a mechanical telescoping link that can be
installed between the hitch receiver and the trailer tongue
that typically provides adjustable friction associated with
the telescoping motion to dampen any unwanted trailer
swaying motions while traveling.
The electronic TSC (If equipped) recognizes a swaying
trailer and automatically applies individual wheel brakes
and/or reduces engine power to attempt to eliminate the
trailer sway.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue weight,
just as if it were luggage located at a hitch ball or some
other connecting point of the vehicle. These kinds of
hitches are commonly used to tow small and medium
sized trailers.
WARNING!
If the gross trailer weight is 5,000 lb (2,267 kg) or
more, it is recommended to use a weight-distributing
hitch to ensure stable handling of your vehicle. If you
use a standard weight-carrying hitch, you could lose
control of your vehicle and cause a collision.
WARNING!
It is important that you do not exceed the maximum
front or rear GAWR. A dangerous driving condition can
result if either rating is exceeded. You could lose control
of the vehicle and have a collision.
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STARTING AND OPERATING175
RECOMMENDED DISTRIBUTION HITCH
ADJUSTMENT
Towing With Air Suspension — If Equipped

1. Verify that the vehicle is at the normal ride height.

NOTE:The vehicle must remain in the engine run position with all
doors closed while attaching a trailer for proper leveling of
the air suspension system.
2. Position the truck to be ready to connect to the trailer
(do not connect the trailer).
3. Enable tire jack mode through the instrument cluster or touchscreen radio settings. Tire jack mode will be
canceled and the procedure must be restarted if the
vehicle is driven at speeds above 5 mph (8 km/h).
4. Measure the height from the top of the front wheel opening on the fender to ground; this is height H1.

Measuring Height (H)

5. Attach the trailer to the vehicle without the weight-distributing bars connected.
6. Measure the height from the top of the front wheel opening on the fender to the ground; this is height H2.
7. Install and adjust the tension in the weight-distributing bars per the manufacturer’s
recommendations so that the height of the front
fender is approximately (H2-H1)/3+H1
(about 1/3 the difference between H2 and H1 above
normal ride height [H1]). 8. Use the instrument cluster or touchscreen radio
settings and switch off tire jack mode. Make sure the
truck returns to normal ride height. Perform a visual
inspection of the trailer and weight-distributing hitch
to confirm the manufacturer’s recommendations
have been met.
9. The truck can now be driven.
NOTE:For all towing conditions, we recommend towing with
Tow/Haul mode engaged.
Measurement Example Example Height (mm)
H1 925
H2 946
H2-H1 21
(H2-H1)/3 7
(H2-H1)/3 + H1 932
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STARTING AND OPERATING179
(Continued)
Some trailers (such as boat trailers) will need to
recalibrate while loaded and unloaded.
NOTE:

The system may not detect a trailer in low light condi -
tions. In sunny conditions, the performance may be
degraded as shadows pass over the trailer.
 The driver is always responsible for safe operation of
truck and trailer.
 The driver is always in control of the truck as well as the
trailer and is responsible for controlling the throttle and
brakes.
 The system may not function when the camera lens is
blocked, blurred (covered with water, snow, ice, dirt,
etc) and will not work unless the tailgate is upright and
fully latched.
TOWING REQUIREMENTS
To promote proper break-in of your new vehicle drivetrain
components, the following guidelines are recommended. Perform the maintenance listed in the Scheduled
Servicing section for the proper maintenance intervals
Úpage 333. When towing a trailer, never exceed the
GAWR or GCWR ratings.
Towing Requirements — Tires
 Do not attempt to tow a trailer while using a compact
spare tire.
 Do not drive more than 50 mph (80 km/h) when towing
while using a full size spare tire.
 Proper tire inflation pressures are essential to the safe
and satisfactory operation of your vehicle.
 Check the trailer tires for proper tire inflation pressures
before trailer usage.
 Check for signs of tire wear or visible tire damage
before towing a trailer.
 Replacing tires with a higher load carrying capacity will
not increase the vehicle's GVWR and GAWR limits.
 For further information
Úpage 370.
CAUTION!
Do not tow a trailer at all during the first 500 miles
(805 km) the new vehicle is driven. The engine, axle
or other parts could be damaged.
 Then, during the first 500 miles (805 km) that a
trailer is towed, do not drive over 50 mph (80 km/h)
and do not make starts at full throttle. This helps the
engine and other parts of the vehicle wear in at the
heavier loads.
WARNING!
Make certain that the load is secured in the trailer
and will not shift during travel. When trailering cargo
that is not fully secured, dynamic load shifts can
occur that may be difficult for the driver to control.
You could lose control of your vehicle and have a
collision.
 When hauling cargo or towing a trailer, do not over -
load your vehicle or trailer. Overloading can cause a
loss of control, poor performance or damage to
brakes, axle, engine, transmission, steering, suspen -
sion, chassis structure or tires.
 Safety chains must always be used between your
vehicle and trailer. Always connect the chains to the
hook retainers of the vehicle hitch. Cross the chains
under the trailer tongue and allow enough slack for
turning corners.
 Vehicles with trailers should not be parked on a
grade. When parking, apply the parking brake on the
tow vehicle. Put the tow vehicle transmission in
PARK. For four-wheel drive vehicles, make sure the
transfer case is not in NEUTRAL. Always, block or
"chock" the trailer wheels.
 GCWR must not be exceeded.
Total weight must be distributed between the tow
vehicle and the trailer such that the following four
ratings are not exceeded :
 GVWR
 GTW
 GAWR
 Tongue weight rating for the trailer hitch utilized
WARNING!
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184STARTING AND OPERATING
TOWING TIPS
Before towing, practice turning, stopping, and backing up
the trailer in an area located away from heavy traffic.
Automatic Transmission
The DRIVE range can be selected when towing. The
transmission controls include a drive strategy to avoid
frequent shifting when towing. However, if frequent
shifting does occur while in DRIVE, select TOW/HAUL
mode or select a lower gear range (using the Electronic
Range Select (ERS) shift control).
NOTE:Using TOW/HAUL mode or selecting a lower gear range
(using the ERS shift control) while operating the vehicle
under heavy loading conditions will improve performance
and extend transmission life by reducing excessive
shifting and heat build up. This action will also provide
better engine braking.
Tow/Haul Mode
To reduce potential for automatic transmission
overheating, activate TOW/HAUL mode when driving in
hilly areas, or select a lower gear range (using the (ERS)
shift control) on more severe grades.
Cruise Control — If Equipped
Do not use on hilly terrain or with heavy loads.
 When using the Cruise Control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
 Use Cruise Control in flat terrain and with light loads to
maximize fuel efficiency.
Air Suspension System
To aid in attaching/detaching the trailer from the vehicle,
the air suspension system can be used Úpage 134.
Selecting Tow/Haul or connecting a trailer with an
Integrated Trailer Brake Module (ITBM) will disable
Automatic Aero mode to avoid height changes while
towing and shifting loads or tongue weights.
NOTE:The vehicle must remain in the engine running position
while attaching a trailer for proper leveling of the air
suspension system.
SNOWPLOW
Snowplow Prep Packages are available as a factory
installed option. These packages include components
necessary to equip your vehicle with a snowplow.
NOTE:Before installation of a snowplow it is highly recom -
mended that the owner/installer obtain and follow the
recommendations contained within the current Body
Builder’s Guide. See an authorized dealer, installer or
snowplow manufacturer for this information. There are
unique electrical systems that must be connected to
properly ensure operator safety and prevent overloading
vehicle systems.
WARNING!
Attaching a snowplow to this vehicle could adversely
affect performance of the airbag system in a collision.
Do not expect that the airbag will perform as described
earlier in this manual.
CAUTION!
The “Lamp Out” indicator could illuminate if exterior
lamps are not properly installed.

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