2018 GMC SIERRA length

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DRIVER ASSISTANCE SYSTEMS
F Optional equipment
Hill Descent Control sets and maintains vehicle speed from 2–14 mph w\
hile descending a steep incline in a forward or reverse gear.
1. Press the Hill Descent Control button on the center of the instrument panel. Vehicle speed must be below 31 mph to enable the system. The Hill Descent Contro\
l symbol will
illuminate on the instrument cluster.
2. Increase or decrease speed by applying the accelerator or brake pedal or\
use the Cruise Control +/– buttons on the steering wheel. The adjusted speed becomes\
the new set speed. The symbol flashes when the system is actively applying the brakes to maintain vehicle speed.
See Driving and Operating in your Owner’s Manual.
HILL DESCENT CONTROL
The traction control system limits wheelspin and the StabiliTrak® stability control system assists with directional control of the vehicle in difficult driving conditions. Both systems turn on auto-matically every time the vehicle is started.
Turn off traction control if the vehicle is stuck and rocking the vehicl\
e is required.
Press the Traction Control/StabiliTrak Off button on the center of the instrument panel to turn traction control off or back on. The Traction Control Off light will illuminate on the instrument cluster when the system is off.
See Driving and Operating in your Owner’s Manual.
TRACTION CONTROL AND STABILITRAK SYSTEMS
DIESEL EXHAUST BRAKE (DIESEL MODELS ONLY)
The engine exhaust brake enhances the vehicle brake system by automatica\
lly downshifting the transmission, depending on the length of time the brakes are applied.
Press the Diesel Exhaust Brake button on the center of the instrument panel to turn the system on or off.
See your Duramax Diesel Owner’s Manual.
Front and/or Rear Parking Assist
During low-speed parking maneuvers, the system provides “distance to \
closest object”
information on the Driver Information Center and the Safety Alert Seat p\
ulses or a beep sounds (if selected). When an object is very close, the Safety Alert Seat pul\
ses 5 times or beeps sound (if selected).
To turn the system on or off, press the Parking Assist button on the center of the instrument panel.See Driving and Operating in your Owner’s Manual.