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To rock your vehicle back and forth to get out of snow,
ice, or sand without damaging your transmission,
see If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow
on page 4-33 .
NEUTRAL (N): In this position, your engine does not
connect with the wheels. To restart when you are
already moving, use NEUTRAL (N) only. Also, use
NEUTRAL (N) when your vehicle is being towed.
{ CAUTION: Shifting into a drive gear while the engine is
running at high speed is dangerous. Unless
your foot is rmly on the brake pedal, your
vehicle could move very rapidly. You could
lose control and hit people or objects. Do not
shift into a drive gear while your engine is
running at high speed.
Notice: Shifting out of PARK (P) or NEUTRAL (N)
with the engine running at high speed may damage
the transmission. The repairs would not be
covered by your warranty. Be sure the engine is not
running at high speed when shifting your vehicle. DRIVE (D): This position is for normal driving. It
provides the best fuel economy for your vehicle. If you
need more power for passing, and you are:
Going less than about 35 mph (55 km/h), push your
accelerator pedal about halfway down.
Going about 35 mph (55 km/h) or more, push the
accelerator all the way down.
By doing this, the vehicle shifts down to the next gear
and has more power.
DRIVE (D) can be used when towing a trailer, carrying a
heavy load, driving on steep hills, or for off-road
driving. You may want to shift the transmission to a
lower gear selection if the transmission shifts too often.
Downshifting the transmission in slippery road
conditions could result in skidding, see Skidding under
Loss of Control on page 4-11 .
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MANUAL MODE (M): This position lets drivers select
the range of gears appropriate for current driving
conditions. See Driver Shift Control (DSC) later in this
section.
Notice: Spinning the tires or holding the vehicle in
one place on a hill using only the accelerator
pedal may damage the transmission. The repair will
not be covered by your warranty. If you are stuck,
do not spin the tires. When stopping on a hill,
use the brakes to hold the vehicle in place.
Your vehicle has a shift stabilization feature that adjusts
the transmission shifting to the current driving
conditions in order to reduce rapid upshifts and
downshifts. This shift stabilization feature is designed to
determine, before making an upshift, if the engine
will be able to maintain vehicle speed by analyzing
things such as vehicle speed, throttle position and
vehicle load. If the shift stabilization feature determines
that a current vehicle speed cannot be maintained,
the transmission does not upshift and instead holds the
current gear. In some cases, this may appear to be
a delayed shift, however the transmission is operating
normally. Your vehicle’s transmission uses adaptive shift controls
that compares key shift parameters to pre-programmed
ideal shifts stored in the transmissions computer.
The transmission constantly makes adjustments to
improve vehicle performance according to how
the vehicle is being used, such as with a heavy load or
when temperature changes. During this adaptive
shift controls process, shifting may feel different as the
transmission determines the best settings.
When temperatures are very cold, the Hydra-Matic ®
6L80 automatic transmission’s gear shifting may
be delayed providing more stable shifts until the engine
warms up. Shifts may be more noticeable with a cold
transmission. This difference in shifting is normal.
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Driver Shift Control (DSC)
Your vehicle has a Driver Shift Control (DSC). The DSC
controls the vehicle’s transmission and vehicle speed
while driving down hill or towing a trailer by allowing you
to select a desired range of gears.
To use this feature, do the following:
1. Move the shift lever to the MANUAL MODE (M).
2. Press the plus/minus button, to upshift or downshift
selecting the desired range of gears for your current
driving conditions. The DIC display will show the message MANUAL
SHIFT on the rst line and the current gear will be
displayed on the second line. See Driver Information
Center (DIC) on page 3-48 and DIC Operation and
Displays on page 3-49 for more information. The number
displayed in the DIC is the highest gear that can be
used. However, your vehicle can automatically shift to
lower gears as it adjusts to driving conditions. This
means that all gears below that number are available.
When FIFTH (5) is selected, FIRST (1) through
FIFTH (5) gears are automatically shifted by the vehicle,
but SIXTH (6) cannot be used until the plus/minus
button located on the steering column lever is used to
change to the gear.
Grade Braking is not available when the Driver Shift
Control is active. See Tow/Haul Mode on page 2-34 for
more information.
While using the DSC, cruise control and the tow/haul
mode can be used.
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Tow/Haul Mode
Your vehicle has a tow/haul mode. The tow/haul mode
adjusts the transmission shift pattern to reduce shift
cycling, providing increased performance, vehicle
control, and transmission cooling when towing or hauling
heavy loads.
Press the button located on the end of the shift lever to
turn the tow/haul on or off. When the tow/haul is on,
a light on the instrument panel cluster will come on.
See Tow/Haul Mode Light on page 3-47 for more
information. Also see “Tow Haul Mode” under Towing a Trailer on
page 4-44 for more information.
The tow/haul mode works with the Autoride ®
feature, if
the vehicle has this, to enhance the ride when
trailering or with a loaded vehicle. See Autoride ®
on
page 4-43 .
Grade Braking Grade Braking assists when driving on a downhill grade.
It maintains the vehicle’s speed by automatically
implementing a shift schedule that uses the engine and
the transmission to slow the vehicle. This reduces
wear on the brakes system and increases control of the
vehicle. The system constantly monitors the vehicle’s
speed, acceleration, throttle position, and whether
the brake pedal is being pressed, and determines when
to keep the current vehicle speed or to slow down.
The system will then automatically command downshifts
that reduces the vehicles speed, until the brake pedal
is no longer being pressed. This indicates the desired
vehicle speed has been reached.
The tow/haul mode and grade braking shift modes can
be activated by pressing the button on the end of
the shift control stalk. While in the DSC mode, grade
braking is deactivated, allowing the driver to select
a gear.
See Automatic Transmission Operation on page 2-30 for
more information.
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