Cadillac 2009 STS-V - Manual (Page 191)

To operate the vehicle with the DRL off, turn the
exterior lamp control off and then do one of the
following:
• Turn the exterior lamp control to the parking lamp
position.
• Turn the exterior lamp control to the headlamp
position.
• Turn the exterior lamp control from AUTO to off and
back to AUTO.
An AUTOMATIC LIGHTS OFF message will appear
on the DIC, showing that automatic lighting has
been disabled. See DIC Warnings and Messages
on page 3-79.
The regular headlamp system should be turned on
when needed.
Light Sensor
The light sensor for the DRL is located on top of the
instrument panel. If the sensor is covered, it will prevent it
from sensing light, and the exterior lamps may come on
when they are not needed.
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