2004 Cadillac CTS Owner's Manual - Page 338

Bulb Replacement For the proper type of replacement bulb, see Replacement Bulbs on page 5-55. For any bulb changing procedure not listed in this section, contact your dealer. 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. High Intensity Discharge (HID) Lighting Your vehicle may be equipped with HID headlamps. {CAUTION: The low beam high intensity discharge lighting system operates at a very high voltage. If you try to service any of the system components, you could be seriously injured. Have your dealer or a qualified technician service them. Your vehicle may have HID headlamps. After your 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. Headlamps It is recommended that this component be replaced as a unit. See your dealer. 5-52