terl00

Just purchased 2008 6.7 2500 4wd CTD with the auto tranny.. It has a button beside the exhuast brake button that says LITE LOAD, can anybody tell what it is and what is used for.... Thanks

mikmaze

want a guess? mite be to let you run ower itre pressure when driving the truck empty for comfort without setting low tire pressure warning.// other than that I am open for guesses too.

Patriot2500

Maybe you use that when your not towing?

bthanks

It allows you to run lower pressure in the back tires. As low as 45psi with out the light on the dash coming on.

J BODY

Read your lil book that you paid for and you'll find that they will direct you to that lil sticker on the door frame outlining "loaded" and "unloaded" tire psi.

johnh

i'll just bet he would have figured that out one day!!!!!

terl00

There is nothing in the """LIL""" black book that come with the truck that says anything bout this,,,,that is why im on here asking questions!

J BODY

au contraire mon frair....it's in there. I've shown a few after they didn't believe that one settings was for the wife and the other for the girlfriend.

Scotty

Whats the setting for both?

Onelongshot

I think this takes up quite a few pages in the owners manual. Look for your self untder these pages. 198 and 338. At least this should answer your question.
page 198
CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system operation
or sensor damage may result when using replacement
equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use tire sealant from a can, or
balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.

TPMS “Light Load” Reset Switch – If Equipped
The TPMS ”Light Load” reset switch allows you to
choose between Light Load vehicle conditions and Max
Load vehicle conditions tire pressures and related TPMS
warning levels. The switch is located in the instrument
panel, below the climate control panel. For additional
information refer to “Tire Pressure Monitoring System
(TPMS) — If Equipped” in section 5 of this manual.

page 338 section 5
TIRE PRESSURE MONITOR SYSTEM (TPMS) — IF
EQUIPPED
The Tire Pressure Monitoring System (TPMS) will warn
the driver of a low tire pressure based on the vehicle
recommended cold tire inflation placard pressure. The
placard pressure is defined on the Tire and Loading
Information label. The Tire and Loading Information
label is located on the drivers side B-pillar. Vehicles
equipped to be operated in either the “max load inflation
pressure” condition described on the Tire and Loading
Information label or the alternative “light load inflation
pressure” condition described on the Supplemental Tire
Pressure Information label, may also be equipped with a
reset switch to choose the appropriate TPMS low pressure
warning threshold levels based upon the vehicle
load condition. The Supplemental Tire Pressure Information
label is located on the rear face of the driver door.
Operation of the “Light Load” reset switch is described
later in this manual section.
The tire pressure will vary with temperature by approximately
1 psi (6.9 kPa) for every 12°F (6.5°C). This means
that when the outside temperature decreases, the tire
pressure will decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is defined as
the tire pressure after a vehicle has not been driven for
more than 3 hours, or driven less than 1 mile after a 3
hour period. For information on how to properly inflate
the vehicle’s tires, refer to ”Tire Pressure” under “Tires –
General Information” in this section. The tire pressure
will also increase as the vehicle is driven - this is normal
and there should be no adjustment for this increased
pressure.
The TPM System will warn the driver of a low tire
pressure if the tire pressure falls below the low pressure
warning threshold for any reason, including low temperature
effects, or natural pressure loss through the tire.
The TPM System will continue to warn the driver of low
tire pressure as long as the condition exists, and will not
turn off until the tire pressure is at or above recommended
cold placard pressure. Once the low tire pressure
warning has been illuminated, the tire pressure must be
increased to the recommended cold placard pressure in
order for the TPMS warning lamp to be turned off. The
system will automatically update and the TPMS warning
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.
As an example, assume your vehicle has a recommended
cold tire inflation placard pressure (parked for more than
3 hours) of 35 psi (241 kPa). If the ambient temperature is
68°F (20°C) and the measured tire pressure is 30 psi (207
kPa), a temperature drop to 20°F (-7°C) will decrease the
tire pressure to approximately 26 psi (179 kPa). This tire
pressure is sufficiently low enough to turn ON the Tire
Pressure Monitoring lamp. Driving the vehicle may cause
the tire pressure to rise to approximately 30 psi (207 kPa),
but the Tire Pressure Monitoring lamp will still be ON. In
this situation, the Tire Pressure Monitoring lamp will
turn OFF only after the tires have been inflated to the
vehicle’s recommended cold tire placard pressure value.
NOTE:
² The TPMS is not intended to replace normal tire care
and maintenance, nor to provide warning of a tire
failure or condition.
² The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
² Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
² The TPMS is not a substitute for proper tire maintenance,
and it is the driver’s responsibility to maintain
correct tire pressure, even if under-inflation has not
reached the level to trigger illumination of the “Tire
Pressure Monitoring Telltale Light.”
² Seasonal temperature changes will affect tire pressure,
and the TPM system will monitor the actual tire
pressure in the tire.
Tire Pressure Monitor System (TPMS) “Light
Load” Reset Switch Description – If Equipped
WARNING!
Never operate your vehicle with the TPMS and tire
pressures set to the Light Load Inflation Pressure
settings if carrying more than two occupants (150 lbs
each) plus 200 pounds of cargo. The vehicle “Light
Load Definition” is found in the Supplemental Tire
Pressure Information Label which is 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.
The TPMS “Light Load” reset switch will allow the driver
to switch between the max load inflation pressure (cold)
low pressure warning threshold and the light load inflation
pressure (cold) low pressure warning threshold
depending on the vehicle’s load condition. The Tire and
Loading Information label defines the recommended
front and rear cold tire inflation pressures for the vehicle
when operating in the Max Load condition. A Supplemental
Tire Pressure Information label is also available
defining Light Load tire inflation pressures when operating
in the Light Load condition. When the “Light Load”
reset switch LED is ON, the TPMS is using the light load
inflation pressure (cold) low inflation warning thresholds.
“Light Load” Reset Switch Operation – If
Equipped
² This vehicle may have different recommended tire
pressure values between the front and rear tires as
shown in both the Tire Loading Information Label and
the Supplemental Tire Pressure Information Label. It is
also equipped to be driven with tire pressures appropriate
to either a Light Load condition or the vehicle
Max Load condition.
² The “Light Load” reset switch will allow the driver to
change between the max load inflation pressure (cold)
low pressure warning threshold and the light load
inflation pressure (cold) low pressure warning threshold
depending on the vehicle’s load condition. Refer to
the “Supplemental Tire Pressure Information” label for
the vehicle’s Light Load inflation pressures and “Tire
and Loading Information” label for the vehicle’s Max
Load inflation pressures.
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 Supplemental
Tire 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 “Light Load” reset
switch. If the “Light Load” switch’s amber colored LED
turns ON, the TPMS is using the light load inflation
pressure (cold) low pressure warning thresholds.
If the “Light Load” 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.
To switch back to the max load inflation pressure (cold)
low pressure warning threshold, press the “Light Load”
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
“Light Load” 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 Information
label. The Tire and Loading Information label is
located on the drivers side B-pillar. If the “Light Load”
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.
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:
² Receiver Module
² 4 Wheel Sensors
² 2 Trigger Modules (mounted in the front wheel-wells)
² “Light Load” Reset Switch (located in the instrument
panel)
² Tire Pressure Monitoring Telltale Lamp
Tire Pressure Monitoring Low Pressure Warnings
The Tire Pressure Monitoring Telltale Lamp will
illuminate in the instrument cluster, and an audible
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
the ignition key is cycled, this sequence will repeat,
providing the system fault still exists. A system fault can
occur by any of the following scenarios:
1. Signal interference due to electronic devices or driving
next to facilities emitting the same Radio Frequencies as
the TPM sensors.
2. Installing aftermarket window tinting that affects radio
wave signals.
3. Accumulation of snow or ice around the wheels or
wheel housings.
4. Using tire chains on the vehicle.
5. Using wheels/tires not equipped with TPM sensors.
6. Loss of communication with the trigger modules or
tire pressure monitoring sensors.
NOTE: Your vehicle is equipped with a non-matching
full size spare wheel and tire assembly.
1. This spare tire does not have a tire pressure monitoring
sensor. Therefore, the TPMS will not monitor the tire
pressure in the spare tire.
2. If you install the full size spare tire in place of a road
tire that has a pressure below the low-pressure warning
limit, upon the next ignition key cycle, a chime will
sound and the TPM Telltale Light will still turn ON due
to the low tire.
3. However, after driving the vehicle for up to 10 minutes
above 15 mph (25 km/h), the TPM Telltale Light will
flash on and off for 75 seconds and then remain on solid.
4. For each subsequent ignition key cycle, a chime will
sound and the TPM Telltale Light will flash on and off for
75 seconds and then remain on solid.
5. Once you repair or replace the original road tire, and
reinstall it on the vehicle in place of the full size spare tire,
the TPMS will update automatically and the TPM Telltale
the low-pressure warning limit in any of the four active
road tires. The vehicle may need to be driven for up to 10
minutes above 15 mph (25 km/h) in order for the TPMS
to receive this information.
General Information
This device complies with part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
² This device may not cause harmful interference.
² This device must accept any interference received,
including interference that may cause undesired operation.
The tire pressure sensors are covered under one of the
following licenses:
United States . . . . . . . . . . . . . . . . . . . . . KR5S120123
Canada . . . . . . . . . . . . . . . . . . . . . . . . 2671-S120123

Onelongshot

My door pillar and door jam say that for regular setting or max is 65 front and 80 rear. Under light load you can reduce rear tire pressure to 45 psi and engage the light load button.

Or you can just sit the wife in the front and the girlfriend anywhere where the wife can't see her.