2018 GMC SIERRA wheel

17
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.

19
Sunroof Controls
The sunroof controls are located on the over-head console.
SLIDETILT Express Open/
SLIDE TILT
Close
Fully press the rear of the SLIDE switch to express open the sunroof. Gently press and hold the switch to partially open the sunroof.
Fully press the front of the SLIDE switch to express close the sunroof. Gently press and hold the switch to partially close the sunroof.
SLIDETILTVent/
SLIDE TILT
Close
Press the rear of the TILT switch to vent the sunroof from the closed position.
Press the front of the TILT switch to close the sunroof.
Sunshade
Open and close the sunshade manually by pulling it rearward or forward.
See Keys, Doors and Windows in your Owner’s Manual.
POWER REAR WINDOWF
SUNROOFF
The power rear window switch is located on the overhead console.
Press the switch to open the rear  window.
Pull the switch to close the rear 
window.
Note: The power rear window cannot be operated manually.

See Keys, Doors and Windows in your Owner’s Manual.F Optional equipment
TIRE PRESSURE MONITOR (SINGLE REAR WHEEL MODELS ONLY)
The Low Tire Pressure warning light on the instrument cluster illuminates wh\
en one or more of the vehicle’s tires is significantly underinflated. Fill the t\
ires to the proper tire pressures listed on the Tire and Loading Information label, located below the driver’s\
door latch. Current tire pressures can be viewed on the Driver Information Center.
The Tire Fill Alert provides visual and audible alerts to help when infl\
ating a tire to the recom-mended tire pressure.
Refer to your Owner’s Manual for information about normal monthly tir\
e maintenance.
See Vehicle Care in your Owner’s Manual.