NOTE:
The rear gate opener button is integrated into the license plate light assembly harness.
1. Remove the rear gate trim. 
2. Remove the rear gate garnish.
3. Disconnect the harness connectors of the rear gate opener button and license plate light assembly.
4. Loosen four screws to remove the rear gate garnish lower cover.
5. Hold down the hook of the rear gate opener button, and remove the rear gate opener button.
6. Remove the license plate light.
7. Remove the license plate light assembly harness.