Ride Control Systems; Traction Control/Electronic Stability; Control - GMC HUMMER EV 2022 Manual

3. Press the EPB switch.
The EPB is released when the red parking
brake status light is off.
If the amber service EPB warning light is on,
release the EPB by pressing and holding the
EPB switch. Continue to hold the switch
until the red parking brake status light is
off. If either light stays on after release is
attempted, see your dealer.
Caution
Driving with the parking brake on can
overheat the brake system and cause
premature wear or damage to brake
system parts. Make sure that the parking
brake is fully released and the brake
warning light is off before driving.
If you are towing a trailer and parking on a
hill, see the owner's manual.
Automatic EPB Release
The EPB automatically releases if the vehicle
is running, placed into gear, and an attempt
is made to drive away. Avoid rapid
acceleration when the EPB is applied, to
preserve parking brake lining life.

Ride Control Systems

Traction Control/Electronic
Stability Control
System Operation
The vehicle has a Traction Control System
(TCS) and StabiliTrak/Electronic Stability
Control (ESC) system. These systems help
limit wheel slip and assist the driver in
maintaining control, especially on slippery
road conditions.
TCS activates if it senses that any of the
drive wheels are spinning or beginning to
lose traction. When this happens, TCS
applies the brakes to the spinning wheels
and reduces propulsion system power to
limit wheel spin.
StabiliTrak/ESC activates when the vehicle
senses a difference between the intended
path and the direction the vehicle is actually
traveling. StabiliTrak/ESC selectively applies
braking pressure to any one of the vehicle
wheel brakes to assist the driver in keeping
the vehicle on the intended path.
Driving and Operating
If cruise control is being used and TCS or
StabiliTrak/ESC begins to limit wheel spin,
cruise control will disengage. Cruise control
may be turned back on when road
conditions allow.
Both systems come on automatically when
the vehicle is started and begins to move.
The systems may be heard or felt while
they are operating or while performing
diagnostic checks. This is normal and does
not mean there is a problem with the
vehicle.
It is recommended to leave both systems on
for normal driving conditions, but it may be
necessary to turn TCS off if the vehicle gets
stuck in sand, mud, ice, or snow. See
"Turning the Systems Off and On" later in
this section.
The indicator light for both systems is in the
instrument cluster. This light will:
Flash when TCS is limiting wheel spin.
.
Flash when StabiliTrak/ESC is activated.
.
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