GMC 2011 Acadia - Manual (Page 321)

Black plate (49,1) GMC Acadia/Acadia Denali Owner Manual - 2011
Driving and Operating 9-49
Towing with a Stability Control
System
When towing, the sound of the
stability control system might be
heard. The system is reacting to the
vehicle movement caused by the
trailer, which mainly occurs during
cornering. This is normal when
towing heavier trailers.
Tow/Haul Mode
Tow/Haul assists when pulling a
heavy trailer or a large or heavy
load. The purpose of the Tow/Haul
mode is to:
. Reduce the frequency and
improve the predictability of
transmission shifts.
. Provide the same solid shift feel
as when the vehicle is unloaded.
. Improve control of vehicle speed
while requiring less throttle pedal
activity.
. Increase the charging system
voltage to assist in recharging
a battery installed in a trailer.
Press this button located on the
console to turn on and turn off the
Tow/Haul mode. See Tow/Haul
Mode on page 9‑28.
The Tow/Haul light on the
instrument panel comes on to
indicate that Tow/Haul mode
has been selected.
Tow/Haul may be turned off by
pressing the button again, at
which time the indicator light on
the instrument panel will turn off.
The vehicle will automatically turn
off Tow/Haul every time it is started.
Tow/Haul is designed to be most
effective when the vehicle and
trailer combined weight is at least
75 percent of the vehicle's Gross
Combined Weight Rating (GCWR).
See Trailer Towing on page 9‑52.
Tow/Haul is most useful when
pulling a heavy trailer or a large
or heavy load under the following
driving conditions:
. Travelling through rolling terrain.
. Travelling in stop and go traffic.
. Travelling in busy parking lots
where improved low speed
control of the vehicle is desired.
Operating the vehicle in Tow/Haul
when lightly loaded or with no trailer
will not cause damage but there is
no benefit. Such a selection when
unloaded may result in unpleasant
engine and transmission driving
characteristics and reduced fuel
economy.