How I can set a new PIN gor Garmin StreetPilot c550

Hi,

1. Power your Garmin GPS device on and enter your four-digit PIN.

2 Touch "Settings" (the wrench tool icon) on your menu and select "System."

3 Click "Restore" at the bottom of the GPS System Settings screen and hit "OK."

4 Touch the button next to "Garmin Lock" and touch "OK."
5 Enter a new four-digit PIN twice and hit "Yes" to accept the PIN.

6 Hit "OK" and drive to your security location. Touch "Set.

In case you FORGOT the Pin, read :-

http://www.fixya.com/support/r3716396-unlock_garmin_gps

Note - The first procedure is How you could change the PIN and the link is if you forgot the PIN.

I hope i have been helpful.

Thank You!!