The vehicle has a vehicle stability enhancement system called StabiliTrak. It is an advanced computer controlled system that assists with directional control of the vehicle in difficult driving conditions.
StabiliTrak activates when the computer senses a difference between the intended path, and the direction the vehicle is actually traveling. StabiliTrak selectively applies braking pressure at any one of the vehicle's brakes to help steer the vehicle in the intended direction.
StabiliTrak is on automatically whenever the vehicle is started. To assist with directional control of the vehicle, the system should always be left on.

TCS/StabiliTrak Light
When the stability control system activates,
flashes on in the instrument cluster.
This also occurs when traction control is activated.
A noise may be heard or vibration may be felt in the brake pedal. This is normal. Continue to steer the vehicle in the intended direction.
If there is a problem detected with StabiliTrak, SERVICE STABILITRAK is displayed
on the Driver Information Center (DIC). When this message is displayed and/or
comes on and stays on, the vehicle
is safe to drive but the system is not operational.
Driving should be adjusted accordingly.
If
comes on and stays on, reset
the system:
1. Stop the vehicle.
2. Turn the engine off and wait 15 seconds.
3. Start the engine.
If
still comes on and stays on at
a speed above 20 km/h (13 mph), see your dealer for service.

TCS/StabiliTrak Button
is on the console.

StabiliTrak Off Light

TCS Off Light
StabiliTrak can be turned off if needed by pressing and holding
until
and
come on in the instrument cluster.
When StabiliTrak is turned off, the system will not assist with directional control
of the vehicle or limit wheel spin. Driving should be adjusted accordingly.
Press and release
again to turn
the system back on.
If cruise control is being used when StabiliTrak activates, cruise control will automatically disengage. Press the cruise control button to reengage when road conditions allow.
Traction Control System (TCS)
Cruise ControlTest Probe Caution
Caution: Do not insert test equipment probes (DMM etc.) into any
connector or fuse block terminal. The diameter of the test probes will
deform most terminals. A deformed terminal will cause a poor connection, which
will result in a system failure. Always use the EL-35616
GM-Approved Terminal T ...
Vehicle, Engine and Transmission ID and VIN Location, Derivative and Usage
Note:: Graphic shows exemplary VIN.
The VIN plate is the legal identifier of the vehicle. The VIN plate is
located on the upper left corner of the instrument panel (I/P) and can
be seen through the windshield from the outside of the vehicle:
...
Installation Procedure
Prepare all mating surfaces as necessary.
Align the body lock pillar outer panel reinforcement.
Create 8 x 24 mm (5/16 x 15/16 in) slots for MIG-brazing upper (1) and
lower (2).
Clean and prepare the attaching surfaces for spot welding and brazing.
Position the body loc ...