Hummer 2010 H3 - Manual (Page 246)

9-62 Driving and Operating
The image on the screen is
provided by the camera located on
the rear bumper.
The image from the camera that
appears on the screen appears
farther than the actual distance.
The area displayed by the camera
is limited. The camera does not
display objects which are close to
either corner of the bumper or under
the bumper. On the H3, the spare
tire and carrier extends rearward of
the rear bumper. The area displayed
on the screen may vary according to
vehicle orientation or road
conditions.
The following illustration shows
the field of view that the camera
provides.
H3 Field of View
Notice: The spare tire extends
farther away from rear of the
vehicle than the trailer hitch
shown on rear vision camera
display. The spare tire could hit
an object even though there
appears to be enough distance on
the display between the trailer
hitch and objects behind you
causing vehicle or property
damage. Do not use this system
to judge the distance between the
spare tire and objects
behind you.