Descent Control Mode
Descent Control mode helps control the vehicle and engine speed when descending a grade.
Note: Before engaging Descent Control mode, determine an appropriate speed for the vehicle load and grade of the road.
To activate Descent Control mode, manually set the engine brakes with the shifter stalk and, while the engine brakes are actively working, set cruise to the desired descent speed. A Descent Control mode engaged icon will appear on the ICUC screen showing it is active. See Fig..
-
1.Icon Showing Descent Control Mode Engaged
Fig. 1, Descent Control Mode Active
The Descent Control mode will attempt to manage the vehicle's speed by varying the engine brake level.
The driver should be ready to intervene by applying the service brakes if the grade is too steep and the vehicle is traveling too fast. Applying the service brake to slow the vehicle will not cancel cruise control. Once the service brake is released, the vehicle speed becomes the new Descent Control set speed. A pop-up will appear on the instrument cluster screen to notify the driver of the new speed. See Fig..
Fig. 2, New Descent Control Mode Set Speed Pop-Up
When the vehicle's descent is complete, return the engine brake stalk to the OFF/Auto position. At this point the Descent Control set speed will become the new cruise speed.