transmission GMC SIERRA 2021 Get To Know Guide

5
STARTING THE VEHICLE
With the vehicle in Park or Neutral, rotate the key clockwise to the Start position.
TURNING OFF THE VEHICLE
Shift to Park.
Push the key all the way in (1) and then rotate the key counter-clockwise to the Lock/Off position (2).
See Driving and Operating in your Owner’s Manual.
The Remote Keyless Entry transmitter (key fob) must be in the vehicle to turn on the ignition.
STARTING THE ENGINE/ON
With the transmission in Park or Neutral, press and hold the brake pedal and then
press the ENGINE START/STOP button
to start the engine. The green button
indicator will illuminate.
Note: If the key fob battery is weak, place the
key fob in the pocket in the center storage
compartment (under the bench seat) or center
console cupholders (bucket seats) to enable the
engine to start. Replace the key fob battery as
soon as possible.
STOPPING THE ENGINE/OFF
Shift to Pa rk and press the ENGINE START/STOP button to turn off the engine. The
green button indicator will turn off.
Power will be available for 10 minutes to operate the audio system until the driver’s
door is opened and to operate the windows and sunroof
F until any door is opened.
ACCESSORY MODE
With the engine off and the brake pedal not depressed, press the ENGINE START/
STOP button to place the ignition in accessory mode. The amber button indicator will
illuminate. Press and hold the ENGINE START/STOP button for several seconds to
place the ignition in Service Mode to operate additional systems.
See Driving and Operating in your Owner’s Manual.
F Optional equipment
KEYLESS (PUSHBUTTON) STARTF
KEYED IGNITION SYSTEM (If EquIppEd)
2
1

13
TRACTION SELECT MODES
The Traction Select (Driver Mode) settings automatically adjust various vehicle con-
trol systems based on driving preferences,
weather and road conditions. The modes
are displayed on the Driver Information
Center.
Rotate the control knob (A) to the right to select a mode. Modes may include:
Normal – Use for normal driving.
Sport – Use for enhanced responsiveness on paved roads.
Snow (2WD only) – Use for enhanced traction during slippery conditions.
Off-Road (4WD only) – Use for enhanced control on unpaved roads or trails at moderate speeds.
Tow/Haul – Rotate the knob to the left; use to reduce shift cycling when towing or hauling heavy loads in stop-and-go traffic, rolling hills, or busy parking lots.
Terrain (4WD only) – Press the button for enhanced control in low-speed off-road conditions. The system automatically provides light vehicle braking to simulate engine vehicle braking. Only available with the single-speed transfer case when in4
4
2
.
FOUR-WHEEL DRIVE
Use the four-wheel drive buttons (B) on the
left side of the instrument panel to shift
into and out of four-wheel drive. The Driver
Informa tion Center dis plays the current status of the transfer case.
AUTO Automatic Four-Wheel Drive High
– Use when traction conditions vary for
automatic shifting between 2WD and 4WD.
Shift into this mode at any speed except
when shifting from4
4
2
.
44
2
Two-Wheel Drive High – Use for most
streets and highways. Shift into this mode at any speed except when shifting from
4
4
2
.
4
4
2
Four-Wheel Drive High – Use when extra traction is needed or in most off-road driving. Shift into this mode at any speed except when shifting from
44
2
.
44
2
Four-Wheel Drive LowF – Use when driving off-road in deep sand, mud or snow, or
on steep hills. Shift into or out of this mode when the vehicle is stopped or moving less
than 3 mph with the transmission in Neutral.
N Neutral – Use to dolly or dinghy tow the vehicle behind an RV. Neutral is not avail -
able with the single speed transfer case. Refer to your Owner’s Manual for the shift procedure.
See Driving and Operating in your Owner’s Manual.
F Optional equipment
TRACTION SELECT SYSTEMF/FOUR-WHEEL DRIVEF
4WD Model shown
B
A