GMC 2010 Sierra - Manual (Page 175)

Tow/Haul Mode (Allison Transmission
®
or Hydra-Matic
®
6-Speed Automatic
Transmission)
Vehicles with an Allison or Hydra-Matic
®
6-speed
automatic transmission ® have 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.
Turn the tow/haul mode on and off by pressing the
button, located on the end of the shift lever. When the
tow/haul is on, a light on the instrument panel cluster
will come on.
See Tow/Haul Mode Light on page 4‑48 for more
information.
Also see “Tow Haul Mode” under Towing a Trailer on
page 5‑55 for more information.
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