1. Disconnect the ground cable from battery.
2. Remove the center panel. 
3. Remove the navigation body.
4. Disconnect the connector (green) of GPS antenna.
NOTE:
Attach a string of about 50 cm in length, etc. to the GPS antenna connector for easy installation work.
5. Remove the combination meter assembly.
6. Remove the screw and harness clamp to remove the GPS antenna.
NOTE:
When the GPS antenna harness connector is pulled out, remove the string attached to the connector in step 4).