1. Remove the Interior Trim Panel: Locate the interior trim panel above the rear window. This usually involves carefully prying it loose with plastic trim tools. These tools are designed to prevent scratching the plastic. You might need to start at the edges and work your way around, releasing plastic clips. Consult your owner's manual or a repair manual specific to your 2002 Avalanche for precise locations of clips and how to safely remove the panel without breaking it.
2. Disconnect the Electrical Connector: Once the trim panel is removed, you'll see the third brake light assembly. Locate the electrical connector attached to the light assembly. Gently disconnect it by pressing the release tab.
3. Remove the Brake Light Assembly: Depending on the specific design of your Avalanche, the brake light assembly may be held in place by clips, screws, or a combination of both. Carefully remove the assembly. Again, your owner's manual or a repair manual will provide the best guidance here. You may need to gently push or pull on it.
4. Replace the Bulb: Once the assembly is out, you'll usually find the bulb(s) inside. Note how the old bulb is oriented before removing it. Replace it with a new bulb of the correct type (check your owner's manual for the correct bulb type).
5. Reassemble: Carefully reassemble everything in reverse order. Make sure the electrical connector is securely plugged in.
6. Test the Brake Light: Reconnect the battery's negative terminal and test the brake light to make sure it's working correctly.
Important Considerations:
* Owner's Manual: Your 2002 Chevrolet Avalanche owner's manual is your best resource for specific instructions and diagrams. It will show you exactly where the clips and fasteners are located.
* Repair Manual: A repair manual specific to your vehicle model year can be extremely helpful, offering detailed instructions and diagrams.
* Plastic Trim Tools: Invest in a set of plastic trim tools. These are inexpensive and help prevent damage to your vehicle's interior.
* Bulb Type: Make sure you purchase the correct replacement bulb. The owner's manual or the old bulb will list the correct type.
* Safety First: Always disconnect the negative battery terminal before working on any electrical components.
If you're uncomfortable with this repair, it's best to take your Avalanche to a qualified mechanic. Improperly installing the third brake light could lead to electrical issues or safety hazards.
