The official notice
Defect
ON CERTAIN PASSENGER VEHICLES, THE DAYLIGHT RUNNING LIGHTS (DRL), TURN SIGNAL, AND PARKING LAMPS USE THE SAME BULB. THE BULB MAY BECOME DAMAGED FROM VIBRATION WITHIN A LOOSE FITTING SOCKET OR AIR ENTERING THE BULB DUE TO AN INADEQUATE SEAL. BOTH OF THESE CONDITIONS WILL CAUSE THE BULB TO BURN OUT PREMATURELY.
Safety Risk
IF THIS WERE TO OCCUR, THE DRIVER WOULD NOTICE THAT THE ARROW IN THE INSTRUMENT PANEL WOULD FLASH FASTER THAN NORMAL WHEN THE TURN SIGNAL IS ACTIVATED. THE LOSS OF THE DRL AND TURN SIGNALS COULD FAIL TO WARN OTHERS OF THE DRIVER'S PRESENCE OR INTENTIONS AND COULD LEAD TO A VEHICLE CRASH.
Remedy
DEALERS WILL REPLACE THE SOCKET AND BULB IN BOTH LAMPS FREE OF CHARGE. THE RECALL BEGAN ON JULY 31, 2006. OWNERS MAY CONTACT CADILLAC AT 1-866-982-2339.