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Light Electric Heavy Electric Light EOH Heavy EOH
Type of Trailer
Brakes Electric Trailer
Brakes Electric Trailer
Brakes Electric over Hy-
draulic Trailer
Brakes Electric over Hy-
draulic Trailer
Brakes
Load *Under 10,000 lbs *Above 10,000 lbs *Under 10,000 lbs *Above 10,000 lbs
* The suggested selection depends and may change
depending on the customer preferences for braking per-
formance. Condition of the trailer brakes, driving and
road state may also affect the selection.
EVIC/DID Display Messages
The trailer brake control interacts with the Electronic
Vehicle Information Center (EVIC)/Driver Information
Display (DID). Display messages, along with a single
chime, will be displayed when a malfunction is deter-
mined in the trailer connection, trailer brake control, or
on the trailer. Refer to “Electronic Vehicle Information Center/Driver Information Display (DID)” in “Under-
standing Your Instrument Panel” for further information.
CAUTION!Connecting a trailer that is not compatible with the
ITBM system may result in reduced or complete loss
of trailer braking. There may be a increase in stop-
ping distance or trailer instability which could result
in damage to your vehicle, trailer, or other property. 5STARTING AND OPERATING 521
Page 567 of 675

access this information to assist with the diagnosis and
service of your vehicle and emissions system.
WARNING!• ONLY an authorized service technician should con-
nect equipment to the OBD II connection port in
order to diagnose or service your vehicle.
• If unauthorized equipment is connected to the
OBD II connection port, such as a driver-behavior
tracking device, it may:
• Be possible that vehicle systems, including
safety related systems, could be impaired or a
loss of vehicle control could occur that may result
in an accident involving serious injury or death.
• Access, or allow others to access, information
stored in your vehicle systems, including per-
sonal information. For further information, refer to “Privacy Practices — If
Equipped With Uconnect 8.4 Radio” and “Uconnect
CyberSecurity” in “All About Uconnect Access” in your
Owner ’s Manual Radio Supplement and “Cybersecurity”
in “Understanding Your Instrument Panel” in your Own-
er ’s Manual on the DVD.
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines
that the fuel filler cap is loose, improperly
installed, or damaged, a loose gascap indicator
will display in the EVIC/DID telltale display
area. Refer to “Electronic Vehicle Information Center
(EVIC)” or “Driver Information Display (DID)” in “Un-
derstanding Your Instrument Panel” for further informa-
tion. Tighten the fuel filler cap properly and push the 7MAINTAINING YOUR VEHICLE 565
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Fluid Level Check
Check the fluid level when the engine is fully warmed up
and the transmission fluid is at normal operating tem-
perature. Driving with an improper fluid level will
greatly reduce the life of the transmission and of the
fluid. Check the fluid level whenever the vehicle is
serviced.
Fluid Level Check — Procedure
It is best to check the fluid level when the transmission is
at normal operating temperature (170-180°F / 77-82°C for
66RFE transmission, or 158–176°F / 70–80°C for AS66RC
transmission). This normally occurs after at least 15 miles
(25 km) of driving. At normal operating temperature the
fluid cannot be held comfortably between the fingertips.
You can read the transmission sump temperature in the EVIC/DID display (refer to “Electronic Vehicle Informa-
tion Center (EVIC)/Driver Information Display (DID)” in
“Understanding Your Instrument Panel” for further in-
formation).
Use the following procedure to check the transmission
fluid level properly:
1. Monitor the transmission temperature using the
EVIC/DID display, and operate the vehicle as re-
quired to reach the normal operating temperature. If
the transmission is not functioning properly, or the
vehicle cannot be driven, see the NOTE and CAU-
TION below about checking the fluid level at colder
temperatures.
2. Park the vehicle on level ground.
3. Run the engine at normal idle speed for at least 60
seconds, and leave the engine running for the rest of
this procedure.598 MAINTAINING YOUR VEHICLE
Page 614 of 675
Cavity Cartridge Fuse Micro Fuse Description
F37 30 Amp Pink – Cummins Diesel Fuel Heater #2 – If
Equipped
F38 30 Amp Pink – Power Inverter 115V AC – If Equipped
F39 20 Amp Blue – Power Outlet – Special Services Only
F41 – 10 Amp Red Active Grill Shutter – If Equipped
F42 – 20 Amp Yellow Horn
F44 – 10 Amp Red Diagnostic Port
F46 – 10 Amp Red Upfitter – If Equipped
F49 – 10 Amp Red Instrument Panel Cluster
F50 – 20 Amp Yellow Air Suspension Control Module – If
Equipped
F51 – 10 Amp Red Ignition Node Module / Keyless Ignition
F52 – 5 Amp Tan Battery Sensor
F53 – 20 Amp Yellow Trailer Tow – Left Turn/Stop Lights
F54 – 20 Amp Yellow Adjustable Pedals612 MAINTAINING YOUR VEHICLE
Page 617 of 675
Cavity Cartridge Fuse Micro Fuse Description
F77 – 10 Amp Red Drivetrain Control Module/Front Axle
Disconnect Module
F78 – 10 Amp Red Engine Control Module / Electric Power
Steering
F79 – 15 Amp Blue Clearance Lights
F80 – 10 Amp Red Universal Garage Door Opener / Compass
F81 – 20 Amp Yellow Trailer Tow Right Turn / Stop Lights
F82 – 10 Amp Red Steering Column Control Module / Cruise
Control
F84 – 15 Amp Blue Switch Bank / Instrument Cluster
F85 – 10 Amp Red Airbag Module
F86 – 10 Amp Red Airbag Module
F87 – 10 Amp Red Air Suspension – If Equipped / Trailer
Tow / Steering Column Control Module
F88 – 15 Amp Blue Instrument Panel Cluster 7MAINTAINING YOUR VEHICLE 615
Page 618 of 675
Cavity Cartridge Fuse Micro Fuse Description
F90/F91 – 20 Amp Yellow Power Outlet (rear seats) Customer Select-
able
F93 – 20 Amp Yellow Cigar Lighter
F94 – 10 Amp Red Shifter / Transfer Case Module
F95 – 10 Amp Red Rear Camera / Park Assist
F96 – 10 Amp Red Rear Seat Heater Switch
F97 – 25 Amp Clear Rear Heated Seats & Heated Steering
Wheel – If Equipped
F98 – 25 Amp Clear Front Heated Seats – If Equipped
F99 – 10 Amp Red Climate Control
F100 – 10 Amp Red Upfitters – If Equipped
F101 – 15 Amp Blue Electrochromatic Mirror / Smart High
Beams – If Equipped
F104 – 20 Amp Yellow Power Outlets (Instrument Panel / Center
Console)616 MAINTAINING YOUR VEHICLE
Page 634 of 675

MAINTENANCE SCHEDULE
Your vehicle is equipped with an automatic oil change
indicator system. The oil change indicator system will
remind you that it is time to take your vehicle in for
scheduled maintenance.
Based on engine operation conditions, the oil change
indicator message will illuminate. This means that ser-
vice is required for your vehicle. Operating conditions
such as frequent short-trips, trailer tow, extremely hot or
cold ambient temperatures, and E85 fuel usage will
influence when the “Oil Change Required” message is
displayed. Severe Operating Conditions can cause the
change oil message to illuminate as early as 3,500 miles
(5,600 km) since last reset. Have your vehicle serviced as
soon as possible, within the next 500 miles (805 km).
Your authorized dealer will reset the oil change indicator
message after completing the scheduled oil change. If a
scheduled oil change is performed by someone other than your authorized dealer, the message can be reset by
referring to the steps described under “Electronic Vehicle
Information Center (EVIC)/Driver Information Display
(DID)” in “Understanding Your Instrument Panel” for
further information.
Gasoline Engines:
Under no circumstances should oil change intervals
exceed 8,000 miles (13,000 km), twelve months or 350
hours of engine run time, whichever comes first. The 350
hours of engine run or idle time is generally only a
concern for fleet customers.
Severe Duty:
Change Engine Oil at 4,000 miles (6,500 km) if the vehicle
is operated in a dusty and off road environment or is
operated predominately at idle or very low engine
RPM’s. This type of vehicle use is considered Severe Duty632 MAINTENANCE SCHEDULES
Page 661 of 675

GVWR ................................ .505
Hazard
Driving Through Flowing, Rising, Or Shallow Stand-
ing Water ............................ .436
Hazard Warning Flasher ................... .536
Headlights ............................. .619
Automatic ........................... .163
Cleaning ............................ .605
High Beam ........................... .174
High Beam/Low Beam Select Switch ........ .174
Passing ............................. .174
Switch .............................. .163
Head Restraints ......................... .152
Heated Mirrors ...................... .140, 226
Heater ............................. .351, 356
High Beam/Low Beam Select (Dimmer) Switch . . . .174
Hill Descent Control ...................... .456
Hill Descent Control Indicator ............... .456 Hill Start Assist .......................... .446
Hitches
Trailer Towing ........................ .512
Hoisting ............................... .548
Hood Release ........................... .160
Hub Caps .............................. .545
Ignition .................................16
Key .............................. .12, 16
Ignition Key Removal .......................16
Illuminated Entry ..........................24
Immobilizer (Sentry Key) ....................19
Inflation Pressure Tires .................... .484
Information Center, Vehicle .............. .268, 287
Inside Rearview Mirror ............. .128, 129, 136
Instrument Cluster .......... .233, 236, 244, 249, 265
Instrument Panel And Controls .............. .232
Instrument Panel Lens Cleaning .............. .606
Integrated Trailer Brake Controls ............. .51710 INDEX 659