1. Safety First:
* Park your truck on a level surface and engage the parking brake.
* Turn off the ignition and allow the lights to cool if they've been on for a while. Hot bulbs can cause burns.
2. Access the Third Brake Light:
* Locate the third brake light: This is usually mounted on the top of the rear cab.
* Open the tailgate: This will give you better access.
* Remove the interior trim: This usually involves unscrewing screws or popping off plastic clips. The exact method will depend on your truck's trim. Look closely around the brake light for screws or clips. A small flathead screwdriver might be helpful to carefully pry clips loose. Be gentle to avoid breaking the plastic. Some trucks might have a few screws holding a panel covering the light. You might need to consult a repair manual for your specific truck model.
* Disconnect the electrical connector: Carefully unplug the electrical connector from the back of the brake light assembly. This is usually a simple push and release connection.
3. Replace the Bulb:
* Remove the old bulb: This is often a simple twist-and-pull operation. If it's stuck, gently rotate it back and forth while pulling.
* Install the new bulb: Ensure you're using the correct bulb type (check your owner's manual or the old bulb). Gently push it in until it clicks or feels secure.
4. Reassembly:
* Reconnect the electrical connector.
* Reinstall the interior trim: Carefully align the trim pieces and fasten them securely with screws or clips.
* Close the tailgate.
5. Test the Brake Light:
* Turn on the brake lights to verify the new bulb works.
Important Considerations:
* Repair Manual: A repair manual specific to your 1998 Chevy truck model (and possibly even the specific trim level) is incredibly helpful. It will provide detailed diagrams and instructions. You can often find these online or at auto parts stores.
* Bulb Type: Make sure you get the correct replacement bulb. The owner's manual or the old bulb itself will indicate the type.
* Tools: You may need a small flathead screwdriver, a Phillips head screwdriver, or other small tools depending on how your truck's interior trim is secured.
If you're uncomfortable with any part of this process, it's best to take your truck to a qualified mechanic. Improperly installed lights can be a safety hazard.
