Tow/Haul Mode - GMC 2010 Savana 1500 Cargo Owner's Manual

2 (Second): This position reduces vehicle speed even
more than 3 (Third) without using the brakes. You can
use 2 (Second) on hills. It can help control vehicle speed
as you go down steep mountain roads, but then you
would also want to use the brakes off and on.
You may use this feature for reducing torque to the rear
wheels when you are trying to start the vehicle from a
stop on slippery road surfaces.
1 (First): This position reduces vehicle speed even
more than 2 (Second) without using the brakes. You
can use it on very steep hills, or in deep snow or mud.
If the shift lever is put in 1 (First) while the vehicle is
moving forward, the transmission will not shift into first
gear until the vehicle is going slowly enough.
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 the vehicle warranty. If you
are stuck, do not spin the tires. When stopping on a
hill, use the brakes to hold the vehicle in place.

Tow/Haul Mode

Vehicles with an 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 to the right of the steering wheel on
the instrument panel. When tow/haul is on, a light on the
instrument panel cluster will come on.
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