Page 445 of 532

Rear Wheel Bearings — Manufacturer’s Axles
These bearings are normally considered permanently
lubricated. Cleaning and repacking is required only
when axle shafts are removed or in case of extreme water
or dust contamination.
Noise Control System Required Maintenance &
Warranty
For 3500 Two-Wheel Drive and Four-Wheel Drive mod-
els over 10,000 lbs. (4 535 kg) Gross Vehicle Weight
Rating.
All vehicles built over 10,000 lbs. (4 535 kg) Gross Vehicle
Weight Rating and manufactured for sale and use in the
United States are required to comply with the Federal
Government’s Exterior Noise Regulations. These vehicles
can be identified by the Noise Emission Control Label
located in the operator’s compartment. Required Maintenance For Noise Control Systems
The following maintenance services must be performed
every 6 months or 6,000 miles (9 600 km) whichever
comes first, to assure proper operation of the noise
control systems. In addition, inspection and service
should be performed anytime a malfunction is observed MAINTAINING YOUR VEHICLE 445
7
Page 446 of 532

or suspected. Proper maintenance of the entire vehicle
will help the effectiveness of the noise control systems.
Exhaust System
Inspect the entire exhaust system for leaks and damaged
parts. Devices such as hangers, clamps, and U-bolts
should be tight and in good condition. Damaged compo-
nents, burned or blown out mufflers, burned or rusted
out exhaust pipes should be replaced according to the
procedures and specifications outlined in the appropriate
service manual.
Air Cleaner Assembly
Inspect air cleaner housing for proper assembly and fit.
Make certain that the air cleaner is properly positioned
and that the cover is tight. Check all hoses leading to the air cleaner for tightness. The air filter element must also
be clean and serviced according to the instructions out-
lined in the Maintenance Schedule Section of this
manual.
Tampering With Noise Control System Prohibited
Federal law prohibits the following acts or the causing
thereof: (1) the removal or rendering inoperative by any
person, other than for purposes of maintenance, repair, or
replacement, of any device or element of design incorpo-
rated into any new vehicle for the purpose of noise
control prior to its sale or delivery to the ultimate
purchaser or while it is in use, or (2) the use of the vehicle
after such device or element of design has been removed
or rendered inoperative by any person.446 MAINTAINING YOUR VEHICLE
Page 448 of 532
Noise Systems Maintenance Chart and Service Log Maintenance Log and Service Chart (Gas Engines)
Insert
Month, Day, Year under column mileage closest to the mileage at which service was performed.
MILES 6,000 12,000 18,000 24,000 30,000 36,000 42,000 48,000
KILOME-
TERS 9 600 19 000 29 000 36 000 48 000 58 000 67 000 77 000
Exhaust
system-
inspect
Air cleaner
assembly-
inspect
ODOM-
ETER
READING
PER-
FORMED
BY
PER-
FORMED
AT 448 MAINTAINING YOUR VEHICLE
Page 449 of 532
Noise Systems Maintenance Chart and Service Log Maintenance Log and Service Chart (Gas Engines)
Insert
Month, Day, Year under column mileage closest to the mileage at which service was performed.
MILES 54,000 60,000 66,000 72,000 78,000 84,000 90,000 96,000
KILOME-
TERS 87 000 96 000 106 000 116 000 126 000 135 000 145 000 154 000
Exhaust
system-
inspect
Air cleaner
assembly-
inspect
ODOM-
ETER
READING
PER-
FORMED
BY
PER-
FORMED
AT MAINTAINING YOUR VEHICLE 449
7
Page 450 of 532
Maintenance Log and Service Chart (Diesel Engines)
Noise Systems Maintenance Chart and Service Log — Insert Month, Day, Year under column mileage closest to
the mileage at which service was performed.
MILES 7,500 15,000 22,500 30,000 37,500 45,000 52,500 60,000
KILOME-
TERS 12 000 24 000 36 000 48 000 60 000 72 000 84 000 96 000
Exhaust
system-
inspect
Air cleaner
assembly-
inspect
ODOM-
ETER
READING
PER-
FORMED
BY
PER-
FORMED
AT 450 MAINTAINING YOUR VEHICLE
Page 451 of 532
Noise Systems Maintenance Chart and Service Log — Insert Month, Day, Year under column mileage closest to
the mileage at which service was performed.
MILES 67,500 75,000 82,500 90,000 97,500 84,000 105,00 112,500
KILOME-
TERS 108 000 120 000 132 000 144 000 126 000 156 000 168 000 181 000
Exhaust
system-
inspect
Air cleaner
assembly-
inspect
ODOM-
ETER
READING
PER-
FORMED
BY
PER-
FORMED
AT MAINTAINING YOUR VEHICLE 451
7
Page 461 of 532

VEHICLE STORAGE
If you are storing your vehicle for more than 21 days, we
recommend that you take the following steps to mini-
mize the drain on your vehicle’s battery:
• Disconnect the Ignition-Off Draw fuse (I.O.D.) fuse
located in the Integrated Power Module, located in the
engine compartment. The I.O.D. cavity includes a
snap-in retainer that allows the fuse to be discon-
nected, without removing it from the fuse block.
• The electronic shift transfer case should be placed in
the 4HI mode and kept in this position to minimize the
battery drain.
• As an alternative to the above steps you may, discon-
nect the negative cables from both batteries.
• Anytime you store your vehicle, or keep it out of
service (i.e. vacation) for two weeks or more, run the
air conditioning system at idle for about five minutes in the fresh air and high blower setting. This will
insure adequate system lubrication to minimize the
possibility of compressor damage when the system is
started again.
NOTE: When reinstalling the IOD fuse push firmly until
fully seated, the gages in the Instrument Cluster will do
a full sweep, when the ignition key is cycled to RUN. This
is a normal condition.
REPLACEMENT LIGHT BULBS
LIGHT BULBS — Inside Bulb No.
Overhead Console Lights ............... TS 212-2
Dome Light ............................ 7679
NOTE: For lighted switches, see your dealer for replace-
ment instructions.
All of the inside bulbs are brass or glass wedge base.
Aluminum base bulbs are not approved. MAINTAINING YOUR VEHICLE 461
7
Page 470 of 532

Component Fluids, Lubricants and Genuine Parts
Engine Fuel Filter ( 6.7L Diesel
Engine ) Mopar Fuel Filter, P/N 05183410AA or equivalent. Must meet 7 micron rat-
ing. Using a fuel filter that does not meet the manufacturers filtration and
water separating requirements can severely impact fuel system life and re-
liability.
Crankcase Ventilation Filter ( 6.7L
Diesel Engine ) Mopar CCV Filter, P/N 68001433AA or equivalent.
Fuel Selection ( 5.7L Gas Engine ) 89 Octane, (R=M)/2 Method, Mid-Grade Preferred (87 Octane acceptable).
Fuel Selection ( 6.7L Diesel En-
gine ) Use good quality diesel fuel from a reputable supplier in your vehicle. Fed-
eral law requires that you must fuel this vehicle with Ultra Low Sulfur High-
way Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low Sul-
fur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the
emissions control system. For most year-round service, No. 2 diesel fuel
meeting ASTM specification D-975 Grade S15 will provide good perfor-
mance. If the vehicle is exposed to extreme cold (below 20°F or -7°C), or is
required to operate at colder-than-normal conditions for prolonged periods,
use climatized No. 2 diesel fuel or dilute the No. 2 diesel fuel with 50% No.
1 diesel fuel. This will provide better protection from fuel gelling or wax-
plugging of the fuel filters. This vehicle is fully compatible with biodiesel
blends up to 5% biodiesel meeting ASTM specification D-975.470 MAINTAINING YOUR VEHICLE