From the 2007 service Manual:
1. Disconnect negative cable from battery.
2. Use a plastic trim removal stick (2) to remove switch bezel (1). Bezel snaps on.
3. To remove key lock cylinder (1) from housing (2), rotate key to ON position while pressing on release tab (3). This tab (3) is located on the right side of the switch assembly.
4. Pull key lock cylinder (1) from housing (2) for removal.