Driver Assistance Systems - GMC Chevrolet Silverado 2500HD 2021 Owner's Manual

Once the vehicle reaches about 40 km/h
(25 mph) or more, press RES+ up briefly. The
vehicle returns to the previously set speed.
Increasing Speed While Using Cruise Control
Do one of the following:
Press and hold +RES up until the desired
speed is reached, then release it.
To increase vehicle speed in small
increments, press +RES up briefly. For
each press, the vehicle goes about 1 km/h
(1 mph) faster.
The speedometer reading can be displayed
in either English or metric units. See
Instrument Cluster 0 102. The increment
value used depends on the units displayed.
Reducing Speed While Using Cruise Control
Do one of the following:
Press and hold SET down until the
desired lower speed is reached, then
release it.
To slow down in small increments, press
SET down briefly. For each press, the
vehicle goes about 1 km/h (1 mph) slower.
The speedometer reading can be displayed
in either English or metric units. See
Instrument Cluster 0 102. The increment
value used depends on the units displayed.
Passing Another Vehicle While Using Cruise
Control
Use the accelerator pedal to increase the
vehicle speed. When you take your foot off
the pedal, the vehicle will slow down to the
previously set cruise speed. While pressing
the accelerator pedal or shortly following
the release to override cruise control, briefly
pressing SET will result in cruise control set
to the current vehicle speed.
Using Cruise Control on Hills
How well the cruise control works on hills
depends on the vehicle speed, the load, and
the steepness of the hills. When going up
steep hills, pressing the accelerator pedal
may be necessary to maintain vehicle speed.
While going downhill, cruise braking helps
maintain driver selected speed.
Cruise Grade Braking is enabled when the
vehicle is started and cruise control is active.
It is not enabled in Range Selection Mode.
It assists in maintaining driver selected
speed when driving on downhill grades by
using the engine and transmission to slow
the vehicle.
Driving and Operating
For other forms of descent control, see Hill
Descent Control (HDC) 0 244, Automatic
Transmission 0 232, and Tow/Haul Mode
0 235.
Ending Cruise Control
There are four ways to end cruise control:
Step lightly on the brake pedal.
Press .
Shift the transmission to N (Neutral).
To turn off cruise control, press
Erasing Speed Memory
The cruise control set speed is erased from
memory if is pressed or the ignition is
turned off.

Driver Assistance Systems

This vehicle may have features that work
together to help avoid crashes or reduce
crash damage while driving, backing, and
parking. Read this entire section before
using these systems.
247
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