Hill Descent Control (Hdc) - GMC Sierra 2500 HD 2023 Owner's Manual

242 Driving and Operating
Drive the vehicle. If comes on and stays
on, the vehicle may need more time to
diagnose the problem. If the condition
persists, see your dealer.
Turning the Systems Off and On
The button for TCS and StabiliTrak/ESC is on
the center stack.
Caution
Do not repeatedly brake or accelerate
heavily when TCS is off. The vehicle
driveline could be damaged.
To turn off only TCS, press and release
The traction off light displays in the
instrument cluster. The appropriate message
will display in the DIC. To turn TCS on again,
press and release . The traction off light
displayed in the instrument cluster will
turn off.
If TCS is limiting wheel spin when
pressed, the system will not turn off until
the wheels stop spinning.
To turn off both TCS and StabiliTrak/ESC,
press and hold until the traction off light
and the StabiliTrak/ESC OFF light
come on and stay on in the instrument
cluster, then release. The appropriate
message will display in the DIC.
To turn TCS and StabiliTrak/ESC on again,
press and release . The traction off light
and the StabiliTrak/ESC OFF light
the instrument cluster turn off.
StabiliTrak/ESC will automatically turn on if
the vehicle exceeds 56 km/h (35 mph).
Traction control will remain off.
The vehicle has a Trailer Sway Control (TSC)
feature and a Hill Start Assist (HSA) feature.
See Trailer Sway Control (TSC) 0 285 or
.
Hill Start Assist (HSA) 0 240.
Adding accessories can affect the vehicle
performance. See Accessories and
Modifications 0 302.

Hill Descent Control (HDC)

is
If equipped, Hill Descent Control (HDC) sets
and maintains vehicle speed while driving
down steep grades in a forward or reverse
gear. The HDC switch is on the center stack.
Press to enable or disable HDC. Vehicle
speed must be below 50 km/h (31 mph).
in
When enabled, the HDC light displays on
the instrument cluster.
A blinking HDC light indicates the system is
actively applying the brakes to maintain
vehicle speed. HDC can maintain vehicle
speeds between 1 and 22 km/h (1 and
14 mph) on grades greater than or equal
to 10%.
If HDC is to be used for more than
three minutes or on grades steeper than
25%, the transfer case should be put into
Four-Wheel Drive Low (4 ) to reduce the
possibility of brake overheating.