NOTE:Check the automatic transmission fluid level
before towing.
Tow/Haul Mode
To reduce potential for automatic transmission overheat-
ing, turn the “TOW/HAUL” feature ON when driving in
hilly areas, or select a lower gear range (using the
Electronic Range Select (ERS) switches) on more severe
grades.
Electronic Speed Control — If Equipped
• Do not use in hilly terrain or with heavy loads.
• When using the speed control, if you experience speed
drops greater than 10 mph (16 km/h), disengage until
you can get back to cruising speed.
• Use speed control in flat terrain and with light loads to
maximize fuel efficiency.
Cooling System
To reduce potential for engine and transmission over-
heating, take the following actions:
City Driving
When stopped for short periods of time, shift the trans-
mission into NEUTRAL and increase engine idle speed.
Highway Driving
Reduce speed.
Air Conditioning
Turn off temporarily.
SNOWPLOW
Snowplow Prep Packages are available as a factory
installed option. These packages include components
necessary to equip your vehicle with a snowplow.
406 STARTING AND OPERATING
CAUTION!(Continued)
•Your vehicle has been built with improved fluids
that protect the performance and durability of your
vehicle and also allow extended maintenance inter-
vals. Do not use chemical flushes in these compo-
nents as the chemicals can damage your engine,
transmission, power steering or air conditioning.
Such damage is not covered by the New Vehicle
Limited Warranty. If a flush is needed because of
component malfunction, use only the specified
fluid for the flushing procedure.
Engine Oil
Checking Oil Level
To assure proper lubrication of your vehicle’s engine, the
engine oil must be maintained at the correct level. Check
the oil level at regular intervals, such as every fuel stop. The best time to check the engine oil level is about five
minutes after a fully warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Always
maintain the oil level within the SAFE zone on the
dipstick. Adding one quart of oil when the reading is at
the bottom of the SAFE zone will result in a reading at the
top of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.
7
MAINTAINING YOUR VEHICLE 451
CAUTION!
Do not use chemical flushes in your transmission as
the chemicals can damage your transmission compo-
nents. Such damage is not covered by the New
Vehicle Limited Warranty.
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 AS66RCtransmission). 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 display (see Electronic Vehicle Information Center
[EVIC] for further information).
Use the following procedure to check the transmission
fluid level properly:
1. Monitor the transmission temperature using the EVIC
display, and operate the vehicle as required to reach
the normal operating temperature.
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.
4. Fully apply the parking brake and press the brake.
7
MAINTAINING YOUR VEHICLE 475
5. Place the shift lever momentarily into each gear posi-tion (allowing time for the transmission to fully en-
gage in each position), ending with the transmission in
PARK.
6. Wipe the area around the dipstick clean to prevent dirt from entering the transmission.
7. Remove the dipstick, wipe it clean and reinsert it until seated.
8. Remove the dipstick again and note the fluid level on both sides. The fluid level reading is only valid if there
is a solid coating of oil on both sides of the dipstick.
Note that the holes in the dipstick will be full of fluid
if the actual level is at or above the hole. The fluid level
should be between the “HOT” (upper) reference holes
on the dipstick at normal operating temperature. If the
fluid level is low, add fluid through the dipstick tube
to bring it to the proper level. Do not overfill.UseONLY the recommended fluid (see
Fluids, Lubri-
cants, and Genuine Parts for fluid specifications).
After adding any quantity of oil through the dipstick
tube, wait a minimum of two minutes for the oil to
fully drain into the transmission before rechecking the
fluid level.
NOTE: If it is necessary to check the transmission below
the operating temperature, the fluid level should be
between the two “COLD” (lower) holes on the dipstick
with the fluid at 60-70°F / 16-21°C for 66RFE transmis-
sion, or 68-86°F / 20-30°C for AS66RC transmission. Only
use the COLD region of the dipstick as a rough reference
when setting the fluid level after a transmission service
or fluid change. Re-check the fluid level, and adjust as
required, once the transmission reaches normal operating
temperature.
476 MAINTAINING YOUR VEHICLE
CAUTION!
If the fluid temperature is below 50°F (10°C) it may
not register on the dipstick. Do not add fluid until
the temperature is elevated enough to produce an
accurate reading. Run the engine at idle, in PARK, to
warm the fluid.
9. Check for leaks. Release the parking brake.
NOTE: To prevent dirt and water from entering the
transmission after checking or replenishing fluid, make
sure that the dipstick cap is properly reseated. It is
normal for the dipstick cap to spring back slightly from
its fully seated position, as long as its seal remains
engaged in the dipstick tube.
Fluid And Filter Changes — Six-Speed
Transmission
Refer to the “Maintenance Schedule” for the proper
maintenance intervals.
In addition, change the fluid and filter(s) if the fluid
becomes contaminated (with water, etc.), or if the trans-
mission is disassembled for any reason.
Appearance Care And Protection From Corrosion
Protection Of Body And Paint From Corrosion
Vehicle body care requirements vary according to geo-
graphic locations and usage. Chemicals that make roads
passable in snow and ice, and chemicals that are sprayed
on trees and road surfaces during other seasons, are
highly corrosive to the metal in your vehicle. Outside
parking, which exposes your vehicle to airborne contami-
nants, road surfaces on which the vehicle is operated,
7
MAINTAINING YOUR VEHICLE 477
•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 trans-
mission as needed
• Check function of all interior and exterior lights
Required Maintenance
Refer to the Maintenance Schedules on the following
pages for required maintenance.
At Every Oil Change Interval As Indicated By Oil Change Indicator System:
•Change oil and filter.
At Every Oil Change Interval As Indicated By Oil
Change Indicator System:
•Rotate the tires. Rotate at the first sign of irregu-
lar wear, even if it occurs before the oil indicator
system turns on.
• Inspect battery and clean and tighten terminals as
required.
• Inspect automatic transmission fluid if equipped
with dipstick.
• Inspect brake pads, shoes, rotors, drums, hoses
and park brake.
• Inspect engine cooling system protection and
hoses.
• Inspect exhaust system.
• Inspect engine air cleaner if using in dusty or
off-road conditions.
• Lube the front drive shaft fitting.
8
M
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SMAINTENANCE SCHEDULES 509
Adding Engine Coolant (Antifreeze)............463
Adding Fuel ............................ .385
Additives, Fuel .......................... .383
Adjustable Pedals ........................ .166
Airbag ..................................64
Airbag Deployment ........................70
Airbag Light .............................68
Airbag Maintenance ........................71
Airbag, Side ..............................67
Airbag, Window (Side Curtain) ................67
Air Cleaner, Engine (Engine Air Cleaner Filter) . . . .454
Air Conditioner Maintenance .................456
Air Conditioning ......................... .269
Air Conditioning Controls ...................269
Air Conditioning, Operating Tips ..............288
Air Conditioning Refrigerant .................456
Air Conditioning System ....................269
Air Pressure, Tires ........................ .357
Alarm Light ............................ .205Alarm, Panic
.............................27
Alarm (Security Alarm) ......................21
Alarm System (Security Alarm) ................21
Alterations/Modifications, Vehicle ...............7
Antifreeze (Engine Coolant) ..................462
Capacities ........................... .503
Disposal ............................. .466
Anti-Lock Brake System (ABS) ................333
Anti-Lock Warning Light ....................200
Appearance Care ........................ .477
Ashtray ............................... .180
Auto Down Power Windows ..................45
Automatic Door Locks ......................37
Automatic Headlights ..................... .151
Automatic High Beams .....................153
Automatic Transmission ....................474
Adding Fluid ......................... .476
Fluid and Filter Changes ..................477
Fluid Level Check ...................... .475
526 INDEX
Fluid Type........................... .474
Shifting ............................. .300
Special Additives ...................... .474
Axle Fluid ............................. .471
Axle Lubrication (Axle Fluid) .................471
Battery ................................ .455
Keyless Transmitter Replacement (RKE) ........28
Belts, Seat ...............................50
Body Builders Guide ........................6
Body Mechanism Lubrication .................457
B-Pillar Location ......................... .351
Brake Control System, Electronic ..............333
Brake Fluid ............................ .469
Brake System ........................... .330
Anti-Lock (ABS) ....................... .331
Fluid Check .......................... .469
Master Cylinder ....................... .469
Parking ............................. .328Warning Light
........................ .202
Brake/Transmission Interlock .................300
Bulb Replacement ........................ .496
Bulbs, Light .............................114
Cab Top Clearance Lights ...................501
Capacities, Antifreeze (Engine Coolant) ..........503
Capacities, Fluid ......................... .503
Caps, Filler Oil (Engine) .......................... .453
Power Steering ........................ .327
Radiator (Coolant Pressure) ................465
Carbon Monoxide Warning ..................110
Cargo Light ............................ .159
Car Washes ............................ .478
Cellular Phone .......................... .268
Center High Mounted Stop Light ..............499
Center Lap Belts ...........................59
Center Seat Storage Compartment .............187
10
INDEX 527