Brake Assist; Ride Control Systems Stabilitrak System - GMC Acadia 2011 Owner's Manual

Brake Assist

This vehicle has a brake assist
feature 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.
Ride Control Systems
®
StabiliTrak System
The vehicle has the StabiliTrak
system which combines antilock
brake, traction and stability control
systems and helps the driver
maintain directional control of the
vehicle in most driving conditions.
When you first start the vehicle and
begin to drive away, the system
performs several diagnostic checks
to ensure there are no problems.
The system may be heard or
felt while it is working. This is
normal and does not mean there
is a problem with the vehicle.
The system should initialize before
the vehicle reaches 32 km/h
(20 mph). In some cases, it may
take approximately 3.2 km (2 miles)
of driving before the system
initializes.
Driving and Operating
If the system fails to turn on or
activate, one of the following
messages will be displayed on
the Driver Information Center
(DIC): SERVICE TRACTION
CONTROL, SERVICE
STABILITRAK, the StabiliTrak
light will come on and stay and
four chimes are heard. If these
conditions are observed, turn
the vehicle off, wait 15 seconds,
and then turn it back on again to
reset the system. If any of these
messages still appear on the
Driver Information Center (DIC),
the vehicle should be taken in for
service. For more information on
the DIC messages, see Driver
Information Center (DIC) (With DIC
Buttons) on page 5 25 or Driver
Information Center (DIC) (Without
DIC Buttons) on page 5 29.
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