Reverse Automatic Braking (Rab) - GMC HUMMER EV 2022 Owner's Manual

244 Driving and Operating
Electronic stability control or antilock
brakes are activated.
The parking brake is applied or vehicle is
shifted into Park (P).
Driver unbuckles seat belt and
opens door.
System Limitations
Automatic Parking Assist has certain
limitations. The system cannot:
Maneuver the vehicle at speeds exceeding
5 km/h (3 mph).
Detect whether a parking space is legal or
restricted.
Detect pavement markings or lines
Park the vehicle closely lined up with the
vehicle next to it, particularly if the spot
is approached at an angle or if the
parking space is angled.
Park exactly centered in a very large spot.
Always detect short curbs.
Operate while towing any trailer.
Function when the vehicle is raised or
lowered by air suspension.
Detect or automatically react to
approaching traffic when exiting a
parallel spot
Function when Actve Rear Steering is not
in automatic mode.
When the System Does Not Seem to Work
Properly
If the vehicle does not reverse into the
expected parking space, the system could be
maneuvering the vehicle into a previously
detected space.

Reverse Automatic Braking (RAB)

Backing Warning and Reverse Automatic
Braking (RAB)
Vehicles with Adaptive Cruise Control (ACC)
have the Backing Warning System and
Reverse Automatic Braking (RAB) system.
When in R (Reverse), Backing Warning alerts
of rear objects at vehicle speeds greater
than 8 km/h (5 mph), and RAB may
automatically brake hard at speeds between
1-32 km/h (0.5-20 mph).
The Backing Warning System will beep once
from the rear when an object is first
detected, or pulse twice on both sides of the
Safety Alert Seat. When the system detects
a potential crash, beeps will be heard from
the rear, or five pulses will be felt on both
sides of the Safety Alert Seat. There may
also be a brief, sharp application of the
brakes.
Warning
The Backing Warning System only
operates at speeds greater than 8 km/h
(5 mph). It does not detect children,
pedestrians, bicyclists, animals, or objects
below the bumper or that are too close
or too far from the vehicle. In some
situations, such as at higher backing
speeds, there may not be enough time
for the short, sharp application of the
vehicle brake system to occur. To prevent
injury, death, or vehicle damage, even
with the Backing Warning System, always
check the area around the vehicle and
check all mirrors before backing.
When the vehicle is in R (Reverse), if the
system detects the vehicle is backing too
fast to avoid a crash with a detected object
behind your vehicle in your path, it may
automatically brake hard to a stop to help
avoid or reduce the harm caused by a
backing crash.