Jeep 2011 Grand Cherokee Owner's Manual page 390

388 STARTING AND OPERATING
When HDC is enabled, the HDC icon will be illuminated
in the instrument cluster. HDC will automatically apply
the brakes to control downhill speed to the selected level
when necessary on grades greater than approximately
8%. It will usually not activate on level ground.
The HDC speed may be adjusted by the driver to suit the
driving conditions. The speed corresponds to the trans-
mission gear selected.
HDC operation can be overridden with brake application
to slow the vehicle down below the HDC control speed.
Conversely, if more speed is desired during HDC control,
the accelerator pedal will increase vehicle speed in the
usual manner. When either the brake or the accelerator is
released, HDC will control the vehicle back to the origi-
nal set speed.
HDC Operation in 4WD Low Range
To enable HDC, press the HDC switch or put the
Selec-Terrain™ system in the "ROCK" mode. The HDC
icon will be illuminated in the instrument cluster and
HDC will function. If the vehicle speed goes above
20 mph (32 km/h), the HDC icon will flash and HDC will
not function. To disable HDC, press the HDC switch.
4WD Low Range Set Speeds
• 1st = 1 mph (1.6 km/h)
• 2nd = 2.5 mph (4 km/h)
• 3rd = 4 mph (6 km/h)
• 4th = 5.5 mph (9 km/h)
• 5th or D (Drive) = 7.5 mph (12 km/h)
• REVERSE = 1 mph (1.6 km/h)
• NEUTRAL = 2.5 mph (4 km/h)