Cadillac 2011 STS Owner's Manual page 268

This message displays when the hood is not closed
completely. Make sure that the hood is closed
completely. See Hood Release on page 6 12.
This message displays when the outside temperature is
cold enough to create icy road conditions. Adjust your
driving accordingly.
This message displays when the battery in the keyless
access transmitter is low. Replace the battery in the
transmitter. See Battery Replacement under Keyless
Access System Operation on page 3 5.
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This symbol appears
with this message.
If your vehicle has the Lane Departure Warning (LDW)
system, this message may display if the LDW system
does not activate due to a temporary condition. See the
Index in the Navigation manual for more information.
This message displays when the driver side rear door is
not closed completely. Make sure that the door is closed
completely.
This symbol appears
with this message.