2015 GMC SIERRA HD Get To Know Guide

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DrIver assIstance systems
The driver assistance systems use advanced technologies to help avoid collisions by
providing visual and audible alerts under some imminent collision conditions.
Forward Collision AlertF – When approaching a vehicle directly ahead too quickly, the system flashes a visual alert and pulses the Safety Alert SeatF. See Safety Alert Seat.
The Vehicle Ahead indicator will illuminate in green on the instrument cluster when a vehicle is detected and will illuminate in amber when following a vehicle ahead too closely. If your vehicle approaches another vehicle too rapidly, the will flash, six red lights will flash on the windshield and the Safety Alert SeatF will pulse. See Safety Alert Seat.
Press the Collision Alert button on the left side of the steering wheel to set the alert sensitivity to Far, Medium, Near, or Off. The setting is displayed in the Driver Information Center.
Lane Departure WarningF – When crossing a detected lane marking without using a turn signal, the system flashes an amber visual alert on the instrument cluster and pulses the left or right side of the Safety Alert SeatF. See Safety Alert Seat.
Press the Lane Departure Warning button on the center of the instrument panel to turn the system on or off.
Safety Alert SeatF – The driver’s seat pulses, left side, right side, or simultaneously, to alert the driver of potential hazards.
Audible notification may be selected instead of Safety Alert Seat pulsing notification. To change the alert set-ting, go to Settings > Vehicle > Collision/Detection > Alert Type.
Rear Vision CameraF – Provides a view directly behind the vehicle when backing up.
To turn the Rear Vision Camera Guidelines or Rear Park Assist Symbols on or off, go to Settings > Rear Camera.
Front and/or Rear Parking AssistF – During low-speed parking maneuvers, the system provides “distance to clos-est object” information in the Driver Information Center and a caution symbol on the Rear Vision Camera. When the vehicle should be stopped immediately to avoid a collision, a continuous audible tone sounds or the Safety Alert Seat pulses. See Safety Alert Seat.
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 Manual.
F Optional equipment

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automatIc transmIssIon
IntegrateD traI ler braKe control (Itbc)
DIesel ex Haust braKe (Diesel Models Only)
F Optional equipment
Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desired for the current driving conditions.
1. Move the shift lever to the Manual (M) position.
2. Press the + (plus) or – (minus) button on the shift lever to select a lower or higher gear. An M and the current gear will be displayed 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 cycling, such as when towing or hauling heavy loads or driving on steep grades.
Press the Tow/Haul Mode button on the end of the shift lever to turn the system on or off.
See Driving and Operating in your Owner 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.
Slide the lever to the left on the control panel to manually apply the t\
railer brakes.
See Driving and Operating in your Owner Manual.
The engine exhaust brake enhances the vehicle brake system by using engine braking and auto-matically downshifting the transmission, depending on the length of time the brakes are applied, to help slow the vehicle on downhill grades.
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 Manual.

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Hill Descent Control sets and maintains vehicle speed from 2–14 mph while 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 Descen\
t Control symbol will illuminate on the instrument cluster.
2. Increase or decrease speed by applying the accelerator or brake pedal. T\
he 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 Manual.
HIll Descent controlF (z71)
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 automatically every time the vehicle is started.
Turn off traction control if the vehicle is stuck and rocking the vehicle 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 Manual.
tractIon control anD stab IlItraK systems
The Low Tire Pressure warning light on the instrument cluster illuminates when one or more of the vehicle’s tires is significantly underinflated. Fill the tires to the proper tire pressures. The proper tire pressures for the vehicle are listed on the T\
ire and Loading Information label, located below the driver’s door latch. Current tire pressures can be viewed in the Driver Information Center.
Tire pressure is affected by cold weather and distance driven. If the low tire pressure warn-ing light illuminates when the vehicle is first started in cooler temperatures and then turns off as the vehicle is driven, check for the proper tire pressures.
Refer to your Owner Manual for additional information about normal monthly tire maintenance.
See Vehicle Care in your Owner Manual.
tIre Pressure mon Itor (Single Rear Wheel Models Only)
F Optional equipment

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roaDsIDe assIstance
1-800-GMC-8782 TTY Users: 1-888-889-2438(1-800-462-8782)
As the owner of a new GMC, you are automatically enrolled in the GMC Roa\
dside Assistance program for up to 5 years/100,000 miles, whichever occurs first, at no expense to you. This value-added service is intended to provide you with peace o\
f mind as you drive across town or travel the open road.
GMC’s Roadside Assistance toll-free number is staffed by a team of tr\
ained advisors who are available 24 hours a day, 365 days a year, to contact a service prov\
ider for light services (fuel delivery, jump-starts, flat tire and lock-outs) or make arrangements to tow your vehicle to the nearest GMC dealer for any repairs.
Roadside Assistance and OnStar®
If you require roadside service and have a current OnStar subscription, \
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 loca-tion so you will get the help you need.
gmc owner center
The GMC Owner Center, a complimentary service for GMC owners, is a one-s\
top resource designed to enhance your GMC ownership experience. Exclusive member benefits include online service reminders, vehicle maintenance tips, online owner manual,\
special privileges and more. Sign up today at my.gmc.com.
Certain restrictions, precautions and safety procedures apply to your ve\
hicle. Please read your Owner Manual for complete instructions. All information contained herein is based on the latest information available at the time of printing and is subject to change without notice. Copyright 2013 by Gene\
ral Motors. All rights reserved.
We recommend always using ACDelco or genuine GM service parts.
mygmc anD onstar® mobIle aPP s
The myGMC and OnStar RemoteLink mobile apps connect owners to a variety of vehicle information and services, such as a searchable Owner \
Manual, real-time fuel information and Roadside Assistance, as well as enabling users to perform Remote Keyless Entry transmitter commands, including locking and unlocking the doors and starting the vehicle.
An active OnStar account is required to use the OnStar mobile app. Downl\
oad the mobile apps from your mobile device’s app store. To learn more about OnStar \
services, press the OnStar button, refer to your Owner Manual, call 1-888-466-7827 or visit \
OnStar.com.