1. Open the Trunk: Access the trunk of your Cadillac DeVille.
2. Locate the License Plate Lamp Assembly: The license plate light assembly is usually located on the inside of the trunk lid, near the license plate itself. It might be a single unit or two separate units, one on each side of the plate. You'll need to find the access point to the bulb(s). This often involves some sort of cover or trim piece.
3. Remove the Cover or Trim: This step varies depending on your DeVille's exact model. It might involve:
* Pushing and pulling gently on a plastic cover: Look for small clips or tabs holding the cover in place. Carefully pry these open, usually with your fingers or a small flat-head screwdriver (use plastic if possible to avoid scratching).
* Unscrewing a retaining nut or bolt: Some models might have a small screw or nut securing the lamp assembly. Use the appropriate tool to remove it.
4. Disconnect the Bulb: Once you have access to the bulb, gently disconnect it from its socket. Sometimes, you simply pull it straight out; other times, there might be a small retaining clip or tab that needs to be released.
5. Replace the Bulb: Insert the new bulb, making sure it's oriented correctly (it should only fit one way). If it's a twist-and-lock style, twist it gently until it's secure.
6. Reconnect and Reassemble: Reconnect the bulb to its socket. Then, carefully put the cover or trim back in place, ensuring all the clips or screws are properly engaged.
7. Test the Bulb: Close the trunk and test the new license plate bulb to make sure it's working.
Important Considerations:
* Type of Bulb: Before you start, identify the type of bulb your DeVille uses. This information might be in your owner's manual or on the old bulb itself. Buy a replacement bulb of the exact same type.
* Tools: You might need a small flat-head screwdriver (preferably plastic), or possibly a small Phillips head screwdriver, depending on how the access cover is secured.
* Caution: Be gentle when handling the plastic components to avoid breaking them.
If you're not comfortable performing this task yourself, take your car to a qualified mechanic or auto parts store for assistance. They can often replace the bulb quickly and inexpensively.
