Brake Assist; Hold (Avh) - GMC ACADIA 2017 Owner's Manual

Brake Assist

The Brake Assist feature is
designed to assist the driver in
stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brake
control module to supplement the
power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle. The
stability system hydraulic brake
control module increases brake
pressure at each corner of the
vehicle until the ABS activates.
Minor brake pedal pulsation or
pedal movement during this time is
normal and the driver should
continue to apply the brake pedal as
the driving situation dictates. The
Brake Assist feature will
automatically disengage when the
brake pedal is released or brake
pedal pressure is quickly
decreased.
Automatic Vehicle

Hold (AVH)

The Automatic Vehicle Hold (AVH)
feature provides Hill Start Assist
(HSA). This feature will activate
when the vehicle is stopped on a
moderate to steep grade to help
prevent it from rolling in an
unintended direction. After the brake
pedal has been released and before
the accelerator pedal has been
pressed, AVH uses braking
pressure to hold the vehicle
stationary. If AVH is holding the
vehicle, a DIC message displays.
AVH will not activate in a forward
drive gear when facing downhill,
or in R (Reverse) when facing uphill.
Select the duration of the AVH
feature through vehicle
personalization. See Automatic
Vehicle Hold under Comfort and
Convenience in Vehicle
Personalization 0 157. When Short
and Auto Park Brake Off is selected,
the vehicle is held stationary for up
to two seconds after the brake pedal
is released. When Long and Auto
Park Brake On is selected, the
Driving and Operating
vehicle is held stationary for up to
five minutes after the brake pedal is
released. In either case, override
the hold feature by pressing the
accelerator pedal and attempting to
drive away.
If Short and Auto Park Brake Off is
selected, it will hold the vehicle for
two seconds unless the driver door
is opened or the driver safety belt is
unbuckled after releasing the brake
pedal. If Long and Auto Park Brake
On is selected, it will hold the
vehicle for five minutes unless the
driver door is opened and the driver
safety belt is unbuckled prior to
releasing the brake pedal. When
deactivated after five minutes, or if it
is deactivated when the driver
safety belt is unlatched or the driver
door is opened, the Electric Parking
Brake will engage to prevent vehicle
movement.
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