GMC 2006 Sierra - Manual (Page 126)

See Tow/Haul Mode Light on page 3-50 for more
information.
If your vehicle is equipped with the Performance
Package-Enhanced Towing, activating the manual
selectable ride will adjust the shock absorber
characteristics to enhance the ride and handling of the
vehicle for towing or hauling heavy loads.
Also see Tow Haul Mode under Towing a Trailer on
page 4-67 for more information.
Tow/Haul Mode
(Allison Transmission
® )
If your vehicle has an Allison Transmission ® , it may
have a Tow/Haul mode. 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.
The selector button is located on the end of the shift
lever. Turn the Turn Tow/Haul on and off by pressing
the button. When the Tow/Haul is on, a light on the
instrument panel cluster will come on.
See Tow/Haul Mode Light on page 3-50 for more
information.
Also see “Tow Haul Mode” under Towing a Trailer on
page 4-67 for more information.
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