Hummer H2 2010 Owner's Manual page 24

Transmission
Driver Shift Control (DSC)
The vehicle has Driver Shift Control (DSC). DSC
controls the 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:
1. Move the shift lever to the M (Manual Mode). This
will force a downshift from the current gear, for
gears 3 through 6.
2. Press the (+) plus or ( ) minus button on the left
side of the steering wheel , to select the desired
range of gears for current driving conditions.
1-18
When in the M (Manual Mode) a number will display
next to the M, indicating the maximum available gear.
The DIC display will show the message MANUAL
SHIFT on the first line and the maximum available gear
will be displayed on the second line. See Driver
Information Center (DIC) on page 4 42 Driver
Information Center (DIC) and DIC Operation and
Displays (Using DIC Buttons) on page 4 43 or DIC
Operation and Displays (Using Trip Odometer Reset
Stem) on page 4 48 DIC Operation and Displays for
more information. The number displayed in the DIC is
the highest gear available. The transmission will be
limited to the gear selected and lower gears. Shifting
will occur normally while driving, however the cluster
will continue to display the maximum available gear.
Higher gears will not be available unless the selection is
changed to include higher gears using the (+) plus
button.
Grade Braking is not available when the Driver Shift
Control is active. See Tow/Haul Mode on page 3 36
Tow/Haul Mode and Towing a Trailer on page 5 52
Towing a Trailer for more information.
While using the DSC, cruise control and the tow/haul
mode can be used. See Automatic Transmission
Operation on page 3 32