Owner’s Manual

Black plate (55,1)
GMC Yukon/Yukon XL Owner Manual - 2012 - CRC - 11/8/11
Driving and Operating 9-55
SBZA Detection Zones
The SBZA sensor covers a zone of
approximately one lane over from
both sides of the vehicle, 3.5 m
(11 ft). This zone starts at each side
mirror and goes back approximately
5.0 m (16 ft). The height of the
zone is approximately between
0.5 m (1.5 ft) and 2.0 m (6 ft) off
the ground.
Use caution while changing lanes
when towing a trailer, as the SBZA
detection zones do not change
when a trailer is towed.
How the System Works
The SBZA symbol lights up in the
side mirrors when the system
detects a vehicle in the side blind
zone, indicating it may be unsafe to
change lanes. Before making a lane
change, check the SBZA display,
check all mirrors, glance over your
shoulder, and use the turn signals.
Left Side
Mirror Display
Right Side
Mirror Display
When the vehicle is started, both
outside mirror SBZA displays will
briefly come on to indicate the
system is operating.
When the vehicle is moving forward,
the left or right side mirror display
will light up if a vehicle is detected in
that blind zone. If the turn signal is
activated and a vehicle is also
detected on the same side, the
display will flash to give you extra
warning not to change lanes.
At speeds greater then 32 km/h
(20 mph), SBZA displays may come
on when approaching or passing
other vehicles. SBZA displays may
come on when a passed vehicle
remains in or drops back into the
detection zone. SBZA can be
disabled through the Driver
Information Center (DIC). See Driver
Information Center (DIC) on
page 5‑30. If SBZA is disabled by
the driver, the SBZA mirror displays
will not light up.