Page 420 of 542

5. Push the RIGHT arrow on the steering wheel to enter“TRAILER TOW”.
6. Push the UP or DOWN buttons until Trailer Brake Type appears on the screen.
7. Push the RIGHT arrow and then push the UP or DOWN buttons until the proper Trailer Brake Type appears on
the screen. 8. In a traffic-free environment, tow the trailer on a dry,
level surface at a speed of 20–25 mph (30–40 km/h) and
squeeze the manual brake control lever completely.
9. If the trailer wheels lockup (indicated by squealing tires), reduce the GAIN setting; if the trailer wheels turn
freely, increase the GAIN setting.
Repeat steps 8 and 9 until the GAIN setting is at a point just
below trailer wheel lockup. If towing a heavier trailer,
trailer wheel lockup may not be attainable even with the
maximum GAIN setting of 10.
Light Electric Heavy Electric Light EOH Heavy EOH
Type of Trailer Brakes Electric Trailer Brakes Electric Trailer Brakes Electric over Hydrau- lic Trailer BrakesElectric over Hydrau-
lic 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 de-
pending on the customer preferences for braking perfor-
mance. Condition of the trailer brakes, driving and road
state may also affect the selection.
418 STARTING AND OPERATING
Page 433 of 542

CAUTION!
Driving with a hot cooling system could damage your
vehicle. If the temperature gauge reads HOT (H), pull
over and stop the vehicle. Idle the vehicle with the air
conditioner turned off until the pointer drops back
into the normal range. If the pointer remains on HOT
(H), and you hear continuous chimes, turn the engine
off immediately and call for service.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to ensure that
the wheel is properly mounted to the vehicle. Any time a
wheel has been removed and reinstalled on the vehicle, the
lug nuts/bolts should be torqued using a properly cali-
brated torque wrench.
Torque Specifications
Lug Nut/BoltTorque Lug Nut/
Bolt Type **Lug
Nut/Bolt Size Lug Nut/
Bolt
Socket Size
120-150 Ft-Lbs (160-200 N·m) Cone M14 x
1.5022 mm
130-160 Ft-Lbs (190-220 N·m) Flanged
**Use only your authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening.
Inspect the wheel mounting surface prior to mounting the
tire and remove any corrosion or loose particles.
NOTE: Dual wheels are flat mounted, center piloted. The
lug nuts are a two-piece assembly. When the tires are being
rotated or replaced, clean these lug nuts and add two drops
of oil at the interface between the hex and the washer.
6
WHAT TO DO IN EMERGENCIES 431
Page 440 of 542

WARNING!
A loose tire or jack thrown forward in a collision or
hard stop could injure someone in the vehicle. Always
stow the jack parts and the extra tire and wheel in the
places provided.
7. Install wheel center cap (if equipped) and remove wheel blocks. Do not install chrome or aluminum wheel center
caps on the spare wheel. This may result in cap damage.
8. Lower the jack to its fully closed position. If the jack will not lower by turning the dial (thumbwheel) by hand, it
may be necessary to use the jack drive tube in order to
lower the jack. Stow the replaced tire, jack, and tools as
previously described.
9. Adjust the tire pressure when possible.
Hub Caps/Wheel Covers — If Equipped
The hub caps must be removed before raising the vehicle
off the ground.
CAUTION!
Use extreme caution when removing the front and rear
center caps. Damage can occur to the center cap and/or
the wheel if screwdriver type tools are used. A pulling
motion, not a pry off motion, is recommended to
remove the caps.
For single rear wheel (SRW) models, use the flat blade on
the end of the lug wrench to pull the hub cap off. Insert the
blade end into the pull off notch and carefully pull the hub
cap off with a back and forth motion.
On 3500 models with dual rear wheels (DRW), you must
first remove the hub caps. The jack handle driver has a
hook at one end that will fit in the pull off notch of the rear
hub caps. Position the hook and pull straight out on the
ratchet firmly. The hub cap should pop off. The wheel skins
can now be removed. For the front hub cap, use the flat
blade on the end of the lug wrench to pull the caps off. The
wheel skin can now be removed.
438 WHAT TO DO IN EMERGENCIES
Page 514 of 542

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 service
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 “Instrument Cluster
Display” 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 Duty.
Once A Month Or Before A Long Trip:
•
Check engine oil level
• Check windshield washer fluid level
• Check the tire inflation pressures and look for unusual
wear or damage
• Check the fluid levels of the coolant reservoir, brake
master cylinder, power steering and automatic transmis-
sion, and fill as needed
• Check function of all interior and exterior lights
512 MAINTENANCE SCHEDULES
Page 527 of 542

Fluid Type......................... .484, 510
Shifting .............................. .331
Special Additives ........................ .484
Axle Fluid ........................ .482, 483, 510
Axle Lubrication ....................... .482, 483
Back-Up Camera .......................... .160
Battery .............................. .204, 463
Charging System Light ....................204
Keyless Key Fob Replacement ................25
Belts, Seat .................................93
Body Builders Guide ..........................6
Body Mechanism Lubrication ..................471
B-Pillar Location .......................... .376
Brake Assist System ........................ .359
Brake Control System, Electronic ................357
Brake Fluid .......................... .481, 510
Brake System ......................... .356, 481
Fluid Check ........................... .481
Master Cylinder ........................ .481
Parking .............................. .355
Warning Light .......................... .202
Brake/Transmission Interlock ..................331
Bulb Replacement ......................... .501Bulbs, Light
........................... .96, 500
Cab Top Clearance Lights .....................505
Camera, Rear ............................ .160
Capacities, Antifreeze (Engine Coolant) ...........507
Capacities, Fluid .......................... .507
Caps, Filler Oil (Engine) ........................... .459
Power Steering ......................... .354
Radiator (Coolant Pressure) .................479
Carbon Monoxide Warning .................93, 405
Cargo Light ............................. .135
Car Washes .............................. .487
Center High Mounted Stop Light ...............504
Center
Seat Storage Compartment ...............183
Certification Label ......................... .407
Chart, Tire Sizing .......................... .372
Check Engine Light (Malfunction Indicator Light). . . .455
Checking Your Vehicle For Safety ................92
Checks, Safety .............................92
Child Restraint .............................67
Child Restraints Booster Seats ............................71
Child Restraints ..........................67
Child Seat Installation ...................81, 82
10
INDEX 525
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