You may need to apply the parking brake and ensure the vehicle is not running, ensure that the shift control assembly is in the park (P) position, then pull back the white plastic cover on the center connector, and pull up on the center tabs of the lock button, next release the shift cable end and allow the blue spring to tension/adjust the shift cable system, then pull the white cover on the shift cable end back, next engage the locking teeth on the shift cable end and release the white cover, then verify the white cover conceals the natural colored lock. If the white cover does not conceal the natural-colored lock, the shift cable must be readjusted. If all of the gear positions cannot be achieved, the shift cable must be readjusted.