How do you replace the headlight bulb on a 2001 Cadillac Catera?

It's easy - there should be some instructions in the user manual, but if you lost it then just do this: The passenger's side is easier to change than the driver's side because the battery is in the way on the driver's side. If you are changing the driver's side for the first time, check the passenger side to see it clearly then do the driver's side. 1. Remove the cover - a quarter turn with a flat-head screwdriver should do it. 2. Remove the rubber booty that covers the light and wire. 3. Disconnect the wire. There should be only one. 4. Squeeze the metal clips that hold the light in, and gently move them down away from the lightbulb. 5. Pull the lightbulb out. Reverse to add the new one.