Parking Brake - GMC Acadia 15919282 Owner's Manual

Automatic Engine Grade
Braking
Automatic Engine Grade Braking
assists when driving on a downhill
grade. It maintains vehicle speed
by automatically implementing
a shift schedule that uses the
engine and the transmission to
slow the vehicle. The system will
automatically command downshifts
to reduce vehicle speed, until
the brake pedal is no longer being
pressed.
While in the Electronic Range
Select (ERS) mode, grade braking
is deactivated, allowing the driver
to select a range and limiting
the highest gear available. Grade
braking is available for normal
driving and in Tow/Haul mode.
See Automatic Transmission
Operation on page 2-24.

Parking Brake

To set the parking brake, hold the
regular brake pedal down, then push
the parking brake pedal down.
If the ignition is on, the brake
system warning light will come on.
See Brake System Warning Light
on page 3-38.
Features and Controls
Notice: 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.
To release the parking brake,
hold the regular brake pedal down,
then push down momentarily on
the parking brake pedal until
you feel the pedal release.
Slowly pull your foot up off the
park brake pedal. If the parking
brake is not released when you
begin to drive, the brake system
warning light will be on and a chime
will sound warning you that the
parking brake is still on.
If you are towing a trailer and are
parking on a hill, see Towing a
Trailer on page 4-24.
2-27