Yukon
1. Remove the additional brake light trim.
2. Unscrew the nuts (1).

3. Remove the additional brake light (2).
4. Install in the reverse order of removal.
Escalade
1. Remove the additional brake light trim.
2. Disconnect the connector (1)
3. Unscrew the nuts (2).

4. Remove the additional brake light (3).
5. Install in the reverse order of removal.
Avalanche
1. Remove the center roof trim.
2. Loosen the screw (2).

3. Disconnect the additional brake light clips (1).
4. Remove the additional brake light (3).
5. Install in the reverse order of removal.
