1993 Cadillac DeVille Owner's Manual - Page 301

With the vehicle in turn the ElectronicClimate Control to "Auto" and letthe engine idle for 3 minutes or more. Turn your engine off. Now your computer is programmed. a, H L O G E N BULBS I A CAUTION I Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Take special care when handling and disposing of halogen bulbs. Lamp Housings = Exterior Your Cadillac's lamp housings are designed with small vents moisture so will be removed when the lights are on,or after driving for a short time. Halogen HeadlightBulb Replacement The following procedure tells you how remove the halogen headlamp to bulb. Follow either theDomestic or Export illustrations that best describes your vehicle.