2008 DODGE RAM 2500 DIESEL reset

To switch from the max load inflation pressure (cold) low
pressure warning threshold to the light load inflation
pressure (cold) low pressure warning threshold, begin by
placing the ignition switch in the RUN position. Next,
lower all four road tire pressures to the Light Load
Inflation Pressure values as listed on the SupplementalTire Pressure Information label. The Supplemental Tire
Pressure Information label is located on the rear face of
the driver door. Use an accurate tire gauge to check the
tire pressures when lowering all four tire pressures. After
all four tire pressures have been lowered to the Light
Load inflation pressures, press the ªLight Loadº reset
switch. If the ªLight Loadº switch's amber colored LED
turns ON, the TPMS is using the light load inflation
pressure (cold) low pressure warning thresholds.
If the ªLight Loadº reset switch amber colored LED
flashes on and off for 10 seconds, after all four tire
pressures have been lowered to the Light Load inflation
pressures, the pressure in any one of the four tires may
not be at the light load inflation pressure (cold) values as
indicated for the Light Load condition as defined on the
Supplemental Tire Pressure Information label located on
the rear face of the driver door. Using an accurate tire
pressure gauge, re-check the tire pressures for the light
load inflation pressure (cold) value.
Example Supplemental Tire Pressure Label
STARTING AND OPERATING 343
5

WARNING!
It is the driver 's responsibility to change to the max
load inflation pressure (cold) low pressure warning
threshold condition when not driving in the light
load condition as defined as two occupants ( 150 lbs
each) plus 200 pounds of cargo. The vehicle ªLight
Load Definitionº is found in the Supplemental Tire
Pressure Information label located on the rear face of
the driver door. Failure to do so may cause you to lose
control resulting in an accident, causing serious or
fatal injury.
To switch back to the max load inflation pressure (cold)
low pressure warning threshold, press the ªLight Loadº
reset switch. It is not necessary to first fill the tires to the
max load inflation pressure (cold) values to switch the
TPMS system to the max load inflation pressure (cold)low pressure warning threshold. If after pressing the
ªLight Loadº reset switch and tire pressures are below
the max load inflation pressure (cold) low pressure
warning thresholds, the TPMS low pressure warning
telltale lamp located in the Instrument Cluster will turn
ON and a chime will sound. The tire pressures are now
required to be inflated to the max load inflation pressure
(cold) values described on the Tire and Loading Informa-
tion label. The Tire and Loading Information label is
located on the drivers side B-pillar. If the ªLight Loadº
reset switch LED turns OFF the TPMS has been reset and
the TPMS is using the max load inflation pressure (cold)
low pressure warning thresholds.
Tire Pressure Monitor System Components
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the Receiver Module.
344 STARTING AND OPERATING

NOTE:It is particularly important, for you to check the
tire pressure in all of your tires regularly and to maintain
the proper pressure.
The Tire Pressure Monitoring System (TPMS) consists of
the following components:
²Receiver Module
²4 Wheel Sensors
²2 Trigger Modules (mounted in the front wheel-wells)
²ªLight Loadº Reset Switch (located in the instrument
panel)
²Tire Pressure Monitoring Telltale Lamp
Tire Pressure Monitoring Low Pressure Warnings
The Tire Pressure Monitoring Telltale Lamp will
illuminate in the instrument cluster, and an au-
dible chime will be activated when one or more of
the four active road tire pressures are low. Should this
occur, you should stop as soon as possible, check the
inflation pressure of each tire on your vehicle and inflate
each tire to the vehicle's recommended cold placard
pressure value. The system will automatically update
and the Tire Pressure Monitoring Lamp will extinguish
once the updated tire pressures have been received. The
vehicle may need to be driven for up to 10 minutes above
15 mph (25 km/h) to receive this information.
Check TPMS Warnings
The Tire Pressure Monitoring Telltale Warning Light
located in the Instrument Cluster will flash on and off for
75 seconds and will remain on solid when a system fault
is detected. The system fault will also sound a chime. If
STARTING AND OPERATING 345
5

of the plow. Front end tow-in should be checked and
reset if necessary at the beginning and end of the
snowplow season. This will help prevent uneven tire
wear.
The blade should be lowered whenever the vehicle is
parked.
Maintain and operate your vehicle and snowplow equip-
ment following the recommendations provided by the
specific snowplow manufacturer.
Over the Road Operation With Snowplow
Attached
The blade restricts air flow to the radiator and causes the
engine to operate at higher than normal temperatures.
Therefore, when transporting the plow, angle the blade
completely and position it as low as road or surface
conditions permit. Do not exceed 40 mph (64 km/h). The
operator should always maintain a safe stopping distance
and allow adequate passing clearance.
Methods For Removing Snow
Operating Tips
Under ideal snow plowing conditions, 20 mph (32 km/h)
should be maximum operating speed. The operator
should be familiar with the area and surface to be
cleaned. Reduce speed and use extreme caution when
plowing unfamiliar areas or under poor visibility.
STARTING AND OPERATING 373
5

The clear plastic housing on the Filter MinderŸ (If
Equipped), allows you to view the amount of air pressure
drop across the filter element. It consists of a diaphragm
and a calibrated spring sealed inside the plastic housing.
As the air cleaner filter becomes clogged and air pressure
drop across the filter element increases, a yellow disc
travels along a graduated scale on the side of the Filter
MinderŸ.
The yellow disc will always show the greatest restriction
experienced by the filter element. When the disc reaches
the red zone, the filter element may need to be replaced.
There is no other time or mileage interval for changing
the air cleaner filter element.
After a new filter element is inserted, press the rubber
button on the top of the Filter MinderŸ (if equipped).
This action will reset the yellow disc to the clean position.CAUTION!
When using an engine cleaner or a degreaser, be sure
to wrap and tape the Filter MinderŸ to protect the
plastic housing from damage and discoloration.
CAUTION!
Many aftermarket performance air filter elements do
not adequately filter the air entering the engine. Use
of such filters can severely damage your engine.
MAINTAINING YOUR VEHICLE 421
7

Oil Change Indicator System
Your vehicle is equipped with an engine oil change
indicator system. This system will alert you when it is
time to change your engine oil by displaying the words
ªOil Change Requiredº on your Electronic Vehicle Infor-
mation Center (EVIC). The engine oil change indicator
system is duty cycle based, which means the engine oil
change interval may fluctuate depending on your per-
sonal driving style. Driving styles such as frequent stop
and go type driving can increase the frequency of the
engine oil change. This is the result of more frequent
regeneration of the exhaust aftertreatment system, which
can decrease the life of the engine oil. Failure to change
the engine oil per the maintenance schedule can result in
internal engine damage.
For information on resetting the Oil Change Indicator
message, refer to ªOil Change Required ± If Equipped,ºunder ªSystem Status (EVIC Displays)º in the ªElectronic
Vehicle Information Center (EVIC)º Section of this
manual.
Perform Service Indicator
Your vehicle will require emissions maintenance at a set
interval. To help remind you when this maintenance is
due, the Electronic Vehicle Information Center (EVIC)
will display ªPerform Serviceº. When the ªPerform Ser-
viceº message is displayed on the EVIC it is necessary to
have the emissions maintenance performed. Emissions
maintenance includes replacing the Closed Crankcase
Ventilation (CCV) filter element, cleaning of the EGR
Cooler, and cleaning of the EGR Valve. The procedure for
clearing and resetting the9Perform Service9indicator
message is located in the appropriate Service Informa-
tion.
486 MAINTENANCE SCHEDULES
8
M
A
I
N
T
E
N
A
N
C
E
S
C
H
E
D
U
L
E
S

Trip .............................192,199
Off-Pavement Driving (Off-Road)............ 309
Off-Road Driving (Off-Pavement)............ 309
Oil Change Indicator..................145,486
Oil, Engine............................ 480
Capacity............................ 479
Change Interval....................... 414
Dipstick............................. 413
Disposal............................ 418
Filter.........................413,416,480
Identification Logo..................... 414
Materials Added to..................... 415
Pressure Gauge....................... 191
Recommendation...................... 414
Synthetic............................ 415
Viscosity............................ 415
Oil Filter, Change........................ 416
Onboard Diagnostic System................ 409
Opener, Garage Door (HomeLinkt) ........... 151Operating Precautions.................... 409
Outside Rearview Mirrors.................. 85
Overdrive............................. 287
Overdrive OFF Switch.................... 287
Overhead Console....................... 142
Owner's Manual (Operator Manual).......... 501
Panic Alarm............................ 24
Parking Brake.......................... 310
Passenger Airbag On/Off Switch............. 55
Passing Light........................... 134
Pedals, Adjustable....................... 138
Perform Service Indicator, Reset...........146,486
Personal Settings........................ 146
Pets.................................. 74
Pets, Transporting........................ 74
Phone, Cellular.......................... 89
Phone, Hands-Free (UConnectŸ)............. 89
Pickup Box............................ 177
516 INDEX

Remote Keyless Entry (RKE)................. 21
Remote Sound System (Radio) Controls........ 246
Replacement Keys........................ 16
Replacement Tires....................... 331
Reporting Safety Defects................... 500
Resetting Oil Change Indicator.............. 145
Resetting Perform Service Indicator........146,486
Restraint, Head......................... 118
Restraints, Child.......................61,68
Restraints, Occupant...................... 35
Rotation, Tires.......................... 335
Safety Checks Inside Vehicle................. 77
Safety Checks Outside Vehicle............... 78
Safety Defects, Reporting.................. 500
Safety Information, Tire................... 316
Safety Tips............................. 75
Satellite Radio.......................239,241
Satellite Radio Antenna................... 245Seat Belt Maintenance.................... 459
Seat Belt Reminder....................... 46
Seat Belts..........................35,36,77
Adjustable Upper Shoulder Anchorage........ 43
And Pregnant Women................... 47
Child Restraint.......................61,73
Extender............................. 47
Front Seat............................ 36
Pretensioners.......................... 45
Reminder............................ 190
Seats.............................. 115,116
Adjustment.......................... 115
Child............................... 73
Cleaning............................ 457
Folding Floor......................... 174
Heated............................. 126
Lumbar Support....................... 119
Power.............................. 119
Rear Folding.......................121,123
518 INDEX