Principle of operation
WARNING   WARNING:  Hill descent control cannot control descent in all surface conditions and circumstances, such as ice or extremely steep grades. Hill descent control is a driver assist system and cannot substitute for good judgment by the driver. Failure to do so may result in loss of vehicle control, crash or serious injury.
WARNING   WARNING:  Hill descent control does not provide hill hold at zero miles per hour (0 kilometers per hour). When stopped, the parking brake must be applied or the vehicle must be placed in P (Park) or it may roll away.

Hill descent control allows the driver to set and maintain vehicle speed while descending steep grades in various surface conditions.
Hill descent control can maintain vehicle speeds on downhill grades between 3 mph (5 km/h) and 20 mph (32 km/h). Above 20 mph (32 km/h), the system remains armed, but descent speed cannot be set or maintained.
Hill descent control requires a cooling down interval after a period of sustained use. The amount of time that the feature can remain active before cooling varies with conditions. The system provides a warning in the message center and a chime sounds when the system is about to disengage for cooling. At this time, manually apply the brakes as needed to maintain descent speed.
Using hill descent control
Hill Descent Control Icon  Press and release the hill descent button located in the center of the terrain management control. A light in the control illuminates and a chime sounds when this feature activates.
To increase descent speed, press the accelerator pedal until you reach the desired speed. To decrease descent speed, press the brake pedal until you reach the desired speed.
Whether accelerating or decelerating, once you reach the desired descent speed, remove your feet from the pedals and hill descent control maintains the chosen vehicle speed.
Note:   You may observe noise from the ABS pump motor during hill descent control operation. This is a normal characteristic of the ABS and should be no reason for concern.
Hill descent modes
  • At speeds below 20 mph (32 km/h): When you press the Hill Descent Control and Hill Descent Control activates, HILL DESCENT CONTROL ACTIVE appears in the message center for several seconds.
  • At speeds below 20 mph (32 km/h): When you press the Hill Descent Control switch and conditions are not correct for hill descent activation, the Hill Descent Control system enables, the light on the button is solid and HILL DESCENT CONTROL READY displays in the message center for several seconds.
  • At speeds above 20 mph (32 km/h): When you press the Hill Descent Control switch, the Hill Descent Control system enables, the light on the button illuminates and FOR HILL CNTRL, 20 MPH OR LESS displays in the message center for several seconds.
  • For Hill Descent Control to enable, the vehicle must be in a drive gear or (R) Reverse. If the vehicle is in P (Park) or N (Neutral) and you press the button, FOR HILL CNTRL, SELECT GEAR displays in the message center for several seconds.
Refer to the Information Displays for additional Hill Descent Control messages.   See   Information Messages. 

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