Cadillac 2009 CTS - Manual (Page 365)

The vehicle may have HID headlamps. After the
vehicle’s HID headlamp bulb has been replaced, you
may notice that the beam is a slightly different
shade than it was originally. This is normal.
Halogen Bulbs
{ CAUTION:
Halogen bulbs have pressurized gas inside and
can burst if you drop or scratch the bulb. You or
others could be injured. Be sure to read and follow
the instructions on the bulb package.
Front Turn Signal and Fog Lamps
To replace fog lamp bulb:
1. Pull out the push-pins located on the underside of
the protection shield to remove the shield.
2. Reach up behind the front bumper area from under
the vehicle to access the lamp housing.
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