2018 GMC SIERRA Get To Know Guide

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.

18F Optional equipment
AUTOMATIC TRANSMISSION
INTEGRATED TRAILER BRAKE CONTROL (ITBC)F
Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desi\
red for the current driving conditions.
1. Move the shift lever to the L (Manual) position.
2. Press the + (plus) or – (minus) button (A) on the shift lever to select a lower or higher gear. The current gear is displayed next to the L on the Driver Information Center.
The transmission will be limited to the gear selected and lower gears. If vehicle speed is too high or too low for the requested gear, the shift will not occur.
Tow/Haul Mode
The Tow/Haul Mode adjusts the transmission shifts to reduce shift cyclin\
g, such as when towing or hauling heavy loads or driving on steep grades.
Press the Tow/Haul Mode button (B) on the end of the shift lever to turn the system on or off.
GMC Trailering Guide App
The free trailering guide app includes maximum trailer weight ratings by\
model along with
trailering information on hitches and equipment, GMC trailering technolo\
gies, safe trailering techniques and more. Currently available for the iPad®, download the mobile app from the iPad’s app store.
See Driving and Operating in your Owner’s Manual.
The ITBC system can be used to adjust the amount of power output, or Trailer Gain, available to the trailer brakes. The control panel is located on the left side of the instrument panel. ITBC information is displayed on the Driver Information Center.
Adjust the Trailer Gain by pressing the +/– adjustment buttons on the control panel.
Squeeze the levers together on the control panel (left lever does not move) to manually apply the trailer brakes.
See Driving and Operating in your Owner’s Manual.
AB

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.

20
The myGMC mobile app connects owners with a compatible mobile device to \
a variety of vehicle information and services, such as a searchable Owner’s Man\
ual, real-time fuel information, OnStar Vehicle Diagnostic information and Roadside Ass\
istance.
The myGMC mobile app also enables users to send remote commands — inc\
luding remotely starting the vehicle and locking/unlocking the doors — as we\
ll as to locate the vehicle on a map and send destinations to the navigation system (ve\
hicles must be properly equipped).
Download the mobile app from your compatible mobile device’s app stor\
e.
ROADSIDE ASSISTANCE
1-888-881-3302 TTY Users: 1-888-889-2438
As the owner of a new GMC, you are automatically enrolled in the GMC Roa\
dside Assistance program for up to 5 years/60,000 miles, whichever occurs first, at no \
expense to you. GMC’s Roadside Assistance toll-free number is staffed by a team of trained adv\
isors who are available 24 hours a day, 365 days a year, to contact a service provider for light\
services (fuel delivery, jump-starts, flat tire and lock-outs) or make arrangements to tow you\
r vehicle to the nearest GMC dealer for any repairs.
Roadside Assistance and OnStar®
If you require roadside service and have a current OnStar service plan, \
press the OnStar button and the vehicle will send your current GPS location to an OnStar Advisor\
who will speak to you, assess your problem, contact Roadside Assistance and relay your exact lo\
cation so you will get the help you need.
To learn more about OnStar services, press the blue OnStar button, visit onstar.com, call 1-888-4-ONSTAR (1-888-466-7827), or refer to your Owner’s Manual.
GMC OWNER CENTER
Get to know your vehicle inside and out with the GMC Owner Center. Check\
out personalized
information, including an online Owner’s Manual and helpful how-to vi\
deos, track your service
history and warranty status, review your current OnStar Vehicle Diagnost\
ics report (active OnStar account required) and more. Create an account today at my.gmc.com.
MYGMC MOBILE APP
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Certain restrictions, precautions and safety procedures apply to your ve\
hicle. Please read your Owner’s Manual for complete instructions. All information contained in this guide is based \
on the latest information available at the time of printing and is subject to change without notice. Copyright 2017 Gene\
ral Motors. All rights reserved.
We recommend always using ACDelco or genuine GM service parts.