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Autolock repeats when:
•
You open then close any door while the
ignition is on and your vehicle speed is
9 mph (15 km/h) or lower.
• Your vehicle reaches a speed greater
than
12 mph (20 km/h).
Autounlock
Autounlock unlocks all the doors when:
• The ignition is on, all the doors are
closed, and your vehicle has been
moving at a speed greater than 12 mph
(20 km/h)
.
• Your vehicle comes to a stop and you
switch the ignition off or to the
accessory position.
• You open the driver door within 10
minutes of switching the ignition off or
to accessory.
Note: The doors do not autounlock if you
electronically lock your vehicle after you
switch the ignition off and before you open
the driver door.
Enabling or Disabling Autounlock
You can enable or disable the autounlock
feature in the information display or an
authorized dealer can do it for you. See
General Information
(page 64).
Illuminated Entry
The interior lamps and select exterior
lamps will illuminate when you unlock the
doors with the remote entry system.
The illuminated entry system turns off the
lights if:
• The ignition is on.
• You press the remote control lock
button.
• 25 seconds have passed.
The dome lamp does not turn on if the
control is set to the off position. The lights do not turn off if:
•
You turn them on with the dimmer
control.
• Any door is open.
Battery Saver
The battery saver turns off the interior
lamps 30 minutes after you switch the
ignition off if a door is open and the dome
lamp switch is on. It turns off the interior
lamps after 10 minutes if the dome lamp
switch is off.
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F650750 (TBC) , enUSA, Edition date: 201804, Second-Printing Doors and Locks
Page 53 of 387

Flashing the Headlamp High Beam
Slightly pull the lever toward you and
release it to flash the headlamps.
INSTRUMENT LIGHTING
DIMMER
Adjust the brightness of the instrument
panel and all applicable lit components in
the vehicle during headlamp and parking
lamp operation. •
Tap the top or bottom of the control
to brighten or dim all interior lit
components incrementally.
• Press and hold at the first position the
top or bottom of the control until you
reach the desired lighting level.
• Press and hold the top of the control
to the full on position to activate the
“dome on ” feature. This turns on the
interior courtesy lights. The lights
remain on until you press the bottom
of the control.
DAYTIME RUNNING LAMPS (IF
EQUIPPED) WARNING:
The daytime running
lamps system does not activate the rear
lamps and may not provide adequate
lighting during low visibility driving
conditions. Make sure you switch the
headlamps on, as appropriate, during all
low visibility conditions. Failure to do so
may result in a crash.
The system turns the lamps on in daylight
conditions.
To switch the system on, switch the
lighting control to any position except
headlamps.
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F650750 (TBC) , enUSA, Edition date: 201804, Second-Printing LightingE163268 E163270
Page 279 of 387
Trade name
Number of Bulbs
Function
2825
2
Interior visor lamp
2825
2
Mirror turn signal
2825
2
Mirror clearance lamp
194
5
Front clearance lamps and
front identification lamps
Note: To replace instrument panel lights,
see an authorized dealer.
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F650750 (TBC) , enUSA, Edition date: 201804, Second-Printing Capacities and Specifications
Page 327 of 387

There are three types of maintenance
intervals for general vehicle environments:
On-Highway, City and Severe Service. In
all applications, monitoring miles
(kilometers) and time and when the engine
is due for an oil change determine the
actual interval. When the engine oil change
is required before the truck lubrication
interval, perform the lubrication at the
same time in order to reduce your vehicle
’s
time out of service.
Air Brake Adjustment WARNING: Failure to maintain
proper air brake adjustment can result
in reduction or loss of braking ability.
A qualified service technician, keeping to
the instructions in the service manual,
should perform air brake inspection and
adjustment or repairs.
Cam Brakes - Automatic Slack
Adjusters WARNING:
Do not manually
adjust the automatic slack adjusters to
correct excessive push rod stroke as it
may result in reduced brake
effectiveness and a vehicle crash.
Excessive push rod stroke indicates that a problem exists with the automatic
adjuster, with the installation of the
adjuster, or with foundation brake
components that manual adjustment
does not remedy. Seek service from a
qualified facility for excessive push rod
stroke.
Inspect standard air brakes equipped with
automatic slack adjusters for proper brake
adjustment as listed in the maintenance
schedule charts.
However, inspect the brakes more
frequently when subjecting them to heavy
use or adverse operating conditions such
as:
• Frequent brake applications while fully
loaded.
• Operation on hilly or mountainous
terrain.
• Frequent operation on dirt, gravel or
mud.
Some aftermarket brake linings also
require more frequent inspections.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections every
month or at six-month intervals. Check Every Month
Air filter restriction gauge. 1
Engine oil level.
Fuel and water separator. Drain if necessary, or if indicated by the information display. 1
Function of all interior and exterior lights.
Holes and slots in the tail pipe to make sure they are functional and clear of debris. 1
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F650750 (TBC) , enUSA, Edition date: 201804, Second-Printing Scheduled Maintenance