206 DRIVING AND OPERATINGsupplement the power brake systemunder conditions where the driver hasquickly and forcefully applied thebrake pedal in an attempt to quicklystop or slow down the vehicle. Thestability system hydraulic brakecontrol module increases brakepressure at each corner of the vehicleuntil the ABS activates. Minor brakepedal pulsation or pedal movementduring this time is normal and thedriver should continue to apply thebrake pedal as the driving situationdictates. The brake assist feature willautomatically disengage when thebrake pedal is released or brake pedalpressure is quickly decreased.Ride Control SystemsTraction Control/ElectronicStability ControlThe vehicle has a Traction ControlSystem (TCS) and StabiliTrak ® , anelectronic stability control system.These systems help limit wheel slipand assist the driver in maintainingcontrol, especially on slippery roadconditions.TCS activates if it senses that any ofthe drive wheels are spinning orbeginning to lose traction. When thishappens, the system brakes thespinning wheel(s) and/or reducesengine power to limit wheel spin.StabiliTrak activates when thecomputer senses a difference betweenthe intended path and the directionthe vehicle is actually travelling.StabiliTrak selectively applies brakingpressure at any one of the vehicle'sbrakes to help steer the vehicle in theintended direction.If cruise control is being used andtraction control or StabiliTrak beginsto limit wheel spin, cruise control willdisengage. Cruise control may beturned back on when road conditionsallow.Both systems come on automaticallywhen the vehicle is started and beginsto move. The systems may be heard orfelt while they are operating or whileperforming diagnostic checks. This isnormal and does not mean there is aproblem with the vehicle.It is recommended to leave bothsystems on for normal drivingconditions, but It may be necessary toturn TCS off if the vehicle gets stuckin sand, mud, ice, or snow. See If theVehicle Is Stuck 0 187 and “Turningthe Systems Off and On” later in thissection.
