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CAUTION!
Never use Non-Detergent Oil or Straight Mineral Oil
in the engine or damage may result.
NOTE: A new engine may consume some oil during its
first few thousand miles (kilometers) of operation. This
should be considered a normal part of the break-in and
not interpreted as a problem.
Diesel Engine
The Cummins turbocharged diesel engine does not re-
quire a break-in period due to its construction. Normal
operation is allowed, providing the following recommen-
dations are followed:
• Warm up the engine before placing it under load.
• Do not operate the engine at idle for prolonged
periods. •
Use the appropriate transmission gear to prevent
engine lugging.
•
Observe vehicle oil pressure and temperature indicators.
• Check the coolant and oil levels frequently.
• Vary throttle position at highway speeds when carry-
ing or towing significant weight.
NOTE: Light duty operation such as light trailer towing
or no load operation will extend the time before the
engine is at full efficiency. Reduced fuel economy and
power may be seen at this time.
For additional vehicle break-in requirements, refer to
“Trailer Towing” in “Starting and Operating” of the
Owner ’s Manual.
Because of the construction of the Cummins turbocharged
diesel engine, engine run-in is enhanced by loaded oper-
ating conditions which allow the engine parts to achieve
final finish and fit during the first 6,000 miles (10 000 km).
2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 113
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Oil Pressure Warning Light
Red TelltaleLight What It Means
Oil Pressure Warning Light
This light indicates low engine oil pressure. If the light turns on while driving, stop the ve-
hicle and shut off the engine as soon as possible. A chime will sound when this light turns
on.
Do not operate the vehicle until the cause is corrected. This light does not indicate how
much oil is in the engine. The engine oil level must be checked under the hood.
4
UNDERSTANDING YOUR INSTRUMENT PANEL 243
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•Coolant Temp
• Transmission Temp (Automatic only)
• Oil Temp
• Oil Pressure
• Oil Life
• Battery Voltage
• Gauge Summary
• Engine Hours
Fuel Economy Menu Item
Push and release the UPorDOWN arrow button until
the Fuel Economy menu item is highlighted. Push and
Hold the RIGHTarrow button to reset Average Fuel
Economy.
• Current Fuel Economy Gauge •
Average Fuel Economy value
• Range to Empty
• Dual Fuel Tank levels — If Equipped
• Push and release the RIGHTarrow button to display
the Fuel Tank Level submenu item. Your EVIC will
display the fuel levels of the Front and Rear fuel tanks.
The fuel is automatically transferred from the Rear
tank to the Front tank based on both tank levels. Fuel
transfer is complete once the Front Fuel Level is
greater than the Rear Fuel Level.
Trip A
Push and release the UPorDOWN arrow button until
the Trip A menu item is highlighted in the EVIC. The Trip
A information will display the following:
• Distance
• Average MPG
4
UNDERSTANDING YOUR INSTRUMENT PANEL 275
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•Oil Life
• Battery Voltage — If Equipped
• Gauge Summary:
– Coolant Temperature
– Transmission Temperature (automatic only)
– Oil Temperature
– Oil Pressure
• Engine Hours
Fuel Economy
Push and release the UPorDOWN arrow
button until the Fuel Economy Menu icon/title
is highlighted. Submenu item:
•
Range
• Current MPG or L/100 km
• Average MPG or L/100 km
• To reset the following features (Range, Current MPG
or L/100 km, or Average MPG / L/100 km), push hold
the RIGHT arrow button till features are reset.
• Dual Fuel Tank levels — If Equipped
• Push and release the RIGHTarrow button to display
the Fuel Tank Level submenu item. Your DID will
display the fuel levels of the Front and Rear fuel tanks.
• The fuel is automatically transferred from the Rear
tank to the Front tank based on both tank levels. Fuel
transfer is complete once the Front Fuel Level is
greater than the Rear Fuel Level.
4
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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, or air conditioning. Such damage is
not covered by the New Vehicle Limited Warranty.
If a flush is needed because of component malfunc-
tion, 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.
564 MAINTAINING YOUR VEHICLE
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Brake Fluid Level Check
The fluid level of the master cylinder should be checked
when performing under the hood service or immediately
if the brake system warning lamp indicates system
failure.
The brake master cylinder has a translucent plastic
reservoir. On the outboard side of the reservoir, there is a
“MAX” dot and an “MIN” dot. The fluid level must be
kept within these two dots. Do not add fluid above the
MAX mark because leakage may occur at the cap.
With disc brakes the fluid level can be expected to fall as
the brake linings wear. However, an unexpected drop in
fluid level may be caused by a leak and a system check
should be conducted.
Use only the manufacturer’s recommended brake fluid.
Refer to “Fluids, Lubricants, And Genuine Parts” in
“Maintaining Your Vehicle” for further information.
WARNING!
•Use only manufacturer’s recommended brake fluid.
Refer to “Fluids, Lubricants, And Genuine Parts” in
“Maintaining Your Vehicle” for further information.
Using the wrong type of brake fluid can severely
damage your brake system and/or impair its perfor-
mance. The proper type of brake fluid for your
vehicle is also identified on the original factory
installed hydraulic master cylinder reservoir.
• To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that has
been in a tightly closed container. Keep the master
cylinder reservoir cap secured at all times. Brake
fluid in a open container absorbs moisture from the
air resulting in a lower boiling point. This may
cause it to boil unexpectedly during hard or pro-
longed braking, resulting in sudden brake failure.
This could result in a collision.
(Continued)
590 MAINTAINING YOUR VEHICLE
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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 theEVIC/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. 4. Fully apply the parking brake and press the brake
pedal.
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
7
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fluid level is low, add fluid through the dipstick tube
to bring it to the proper level.Do not overfill.Use
ONLY the specified fluid (see Fluids, Lubricants, 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.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. Reinsert the dipstick. 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.
596 MAINTAINING YOUR VEHICLE