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Black plate (37,1)
Buick Regal Owner Manual - 2012
Driving and Operating 9-37
Hill Start Assist (HSA)
Some vehicles have a Hill Start
Assist (HSA) feature, which may be
useful when the vehicle is stopped
on a grade. This feature is designed
to prevent the vehicle from rolling,
either forward or rearward, during
vehicle drive off. After the driver
completely stops and holds the
vehicle in a complete standstill on a
grade, HSA will be automatically
activated. During the transition
period between when the driver
releases the brake pedal and starts
to accelerate to drive off on a grade,
HSA holds the braking pressure to
ensure that there is no rolling. The
brakes will automatically release
when the accelerator pedal is
applied within the two�second
window. It will not activate if the
vehicle is in a drive gear and facing
downhill or if the vehicle is facing
uphill and in R (Reverse).
Ride Control Systems
Traction Control
System (TCS)
The vehicle may have a Traction
Control System (TCS) that limits
wheel slip. The system operates if it
senses that one or both of the front
wheels are slipping or beginning to
lose traction. When this happens,
the system reduces engine power
and/or applies brake pressure to the
slipping wheel(s).
The system may be heard or felt
while it is working, but this is
normal.
TCS automatically comes on
whenever the vehicle is started. To
limit wheel slip, especially in
slippery road conditions, the system
should always be left on. But, TCS
can be turned off if needed.
d flashes to indicate that TCS is
active. See Traction Control System
(TCS)/StabiliTrak
®
Light on
page 5�21 for more information.
If there is a problem detected with
TCS, the appropriate message
displays in the Driver Information
Center (DIC). See Ride Control
System Messages on page 5�33.
When this message is displayed
and
d comes on and stays on, the
vehicle is safe to drive but the
system is not operational. Driving
should be adjusted accordingly.