Pontiac 2008 G5 Owner's Manual page 205

For more information, see Driver Information Center
(DIC) on page 3-42 and Electronic Stability Control
(ESC)/Traction Control System (TCS) Indicator/Warning
Light on page 3-35.
ESC activates when the computer senses a discrepancy
between your intended path and the direction the
vehicle is actually travelling. ESC selectively applies
braking pressure at any one of the vehicle's brakes to
help steer the vehicle in the direction which you are
steering.
This light flashes on the
instrument panel cluster
when the ESC system
is on and activated.
When the system activates, an ESC ACTIVE message
displays on the Driver Information Center. See DIC
Warnings and Messages on page 3-44. This light also
flashes on the instrument panel cluster when the
ESC system is on and activated. You may also hear a
noise or feel vibration in the brake pedal. This is
normal. Continue to steer the vehicle in the direction
you want it to go.
When the light is on solid and the message(s),
SERVICE ESC, ESC OFF, or both display, the system
will not assist the driver in maintaining directional
control of the vehicle. Adjust your driving accordingly.
See DIC Warnings and Messages on page 3-44.
The Electronic Stability Control (ESC) system is
automatically enabled whenever you start your vehicle.
To assist the driver with vehicle directional control,
especially in slippery road conditions, you should always
leave the system on. But, you can turn ESC off if you
ever need to.
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