GMC Acadia 2011 Owner's Manual page 303

The area displayed by the camera is
limited and does not display objects
that are close to either corner
or under the bumper. The area
displayed can vary depending
on vehicle orientation or road
conditions. The distance of the
image that appears on the screen
differs from the actual distance.
The following illustration shows
the field of view that the camera
provides.
A. View displayed by the camera.
B. Corner of the rear bumper.
Driving and Operating
When the System Does Not
Seem To Work Properly
The rear vision camera system
might not work properly or display
a clear image if:
The RVC is turned off.
See Turning the Rear Camera
System On or Off earlier in this
section.
It is dark.
The sun or the beam of
headlights is shining directly
into the camera lens.
Ice, snow, mud, or anything else
builds up on the camera lens.
Clean the lens, rinse it with
water, and wipe it with a soft
cloth.
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