Page 706 of 734

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”.1500 Models Only
NOTE:
Under no circumstances should oil change inter-
vals exceed 10,000 miles (16,000 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.
2500 – 3500 Models Only
NOTE: Under no circumstances should oil change inter-
vals 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 All Models
NOTE: 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 predominantly at idle, or only very low engine
RPM’s. This type of vehicle use is considered Severe Duty.
704 MAINTENANCE SCHEDULES
Page 708 of 734

Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Additional Inspections
Inspect the CV/Universal joints. XX X X X
Inspect front suspension, tie rod
ends, and replace if necessary. XXX X X X X
1500 Models:
Inspect the front and rear axle sur-
faces. If gear oil leakage is sus-
pected, check the fluid level. If us-
ing your vehicle for police, taxi,
fleet, off-road or frequent trailer
towing, change axle fluid. XX X X X
2500/3500 Models:
Inspect the front and rear axle sur-
faces. If gear oil leakage is sus-
pected, check the fluid level. If us-
ing your vehicle for police, taxi,
fleet, off-road or frequent trailer
towing, change axle fluid. XXX X X X X
Inspect the brake linings, replace
as necessary. XXX X X X X
706 MAINTENANCE SCHEDULES
Page 709 of 734
Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Adjust parking brake as necessary. X X XXX XX
Inspect transfer case fluid. XX X
Additional Maintenance
Replace cabin air filter. XX X XX XX
Replace engine air filter. XX X X X
Replace spark plugs. ** X
Flush and replace the engine cool-
ant at 10 years or 150,000 miles
(240,000 km) whichever comes
first. XX
Change automatic transmission
fluid and filter(s) (six-speed auto-
matic only), if using your vehicle
for police, taxi, fleet, or frequent
trailer towing. XX
Change automatic transmission
fluid and filter(s) (six-speed auto-
matic only). X
8
MAINTENANCE SCHEDULES 707
Page 710 of 734

Mileage or time passed
(whichever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent trailer
towing. XX
Change the transfer case fluid. X
Inspect and replace PCV valve if
necessary. X
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
WARNING!
•You can be badly injured working on or around a
motor vehicle. Do only service work for which you
have the knowledge and the right equipment. If you
have any doubt about your ability to perform a service
job, take your vehicle to a competent mechanic.
(Continued)
WARNING! (Continued)
•Failure to properly inspect and maintain your vehicle
could result in a component malfunction and effect
vehicle handling and performance. This could cause
an accident.
708 MAINTENANCE SCHEDULES
Page 724 of 734

Instrument Cluster..................... .244, 263
Instrument Cluster Display Instrument Cluster Display ..................267
Instrument Panel And Controls .................235
Instrument Panel Lens Cleaning ................677
Integrated Trailer Brake Controls ................562
Interior Appearance Care .....................676
Interior Lights ............................ .143
Intermittent Wipers (Delay Wipers) ..............148
Introduction ................................4
Inverter Outlet (115V) ...................... .189
Jack Location ......................... .583, 600
Jump Starting ............................ .618
Key Fob Programming Additional Key Fobs .............18
Key Fob Battery Service (Remote Keyless Entry) .....25
Key Fob Programming (Remote Keyless Entry) ......21
Key Fob, Remote Keyless Entry .................21
Key-In Reminder ............................17
Keyless Enter-N-Go ..................... .36, 382
Lock The Vehicle’s Doors ................295, 315
Passive Entry ............................36
Passive Entry Programming ...........36, 295, 315 Keyless Entry System
........................21
Key, Replacement ...........................18
Keys ....................................11
Key, Sentry (Immobilizer) ......................17
Lane Change And Turn Signals .................146
Lane Change Assist ........................ .147
Latches ..................................98
Lead Free Gasoline ........................ .541
Leaks, Fluid ...............................98
Life Of Tires ............................. .526
Light Bulbs ........................... .98, 688
Lights ............................... .98, 138
AirBag ............................ .96, 241
Automatic Headlights .....................139
Brake Assist Warning ..................... .503
Brake Warning ......................... .242
Bulb Replacement ....................... .690
Cap
Top Clearance ...................... .694
Cargo................................ .146
Center Mounted Stop ..................... .693
Courtesy/Reading .................144, 145, 174
Cruise ......................... .263, 264, 265
Daytime Running ....................... .140
Engine Temperature Warning ................244
722 INDEX