GMC 2011 Sierra Denali Owner's Manual page 316

9-64 Driving and Operating
When the System Does Not
Seem to Work Properly
The RVC 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.
The back of the vehicle is in an
accident. If this happens, the
position and mounting angle of
the camera can change or the
camera can be affected. Be sure
to have the camera and its
position and mounting angle
checked at your dealer.
The RVC system display in the
rearview mirror may turn off or not
appear as expected due to one of
the following conditions. If this
occurs the left indicator light on the
mirror will flash.
A slow flash may indicate a loss
of video signal, or no video
signal present during the reverse
cycle.
A fast flash may indicate that the
display has been on for the
maximum allowable time during
a reverse cycle, or the display
has reached an Over
Temperature limit.
The fast flash conditions are
used to protect the video device
from high temperature
conditions. Once conditions
return to normal the device will
reset and the green indicator will
stop flashing.
During any of these fault conditions,
the display will be blank and the
indicator will continue to flash as
long as the vehicle is in R (Reverse)
or until the conditions return to
normal.
z
Pressing and holding
left indicator light is flashing will turn
off the video display along with the
left indicator light.
when the