Cadillac 2010 DTS - Manual (Page 221)

Lane Departure Warning (LDW)
Light
For vehicles with the lane
departure warning system,
this light briefly comes
on green, while starting the
vehicle, to indicate that it
is working.
If it does not, have the vehicle serviced by your
dealer/retailer. If the system is working normally the
indicator light will then go off.
This light also comes on green if the system detects a
left or right lane marking. It flashes, changes to
amber and three beeps sound if a detected lane marking
is crossed without using a turn signal. For more
information, see the Index in the Navigation Manual.
Engine Coolant Temperature
Warning Light
The engine coolant
temperature warning light
comes on when the
engine is very hot.
This light also comes on briefly when the vehicle is
started.
If the light does not go out or comes on and stays on
while driving, there may be a problem with the cooling
system. Driving with engine coolant temperature light on
could cause the vehicle to overheat, see Overheated
Engine Protection Operating Mode on page 6-29.
See Engine Overheating on page 6-27 and DIC
Warnings and Messages on page 4-67 for more
information.
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