Radio and nav code

If your 2005 Cadillac STS is displaying "TheftLock" on the navigation and radio screen after replacing the battery, it means that the anti-theft system has been activated. Here are the steps you can take to unlock the system:
1. Turn the ignition key to the "On" position. Don't start the car, just turn the key to "On" position.
2. Wait for the "TheftLock" message to disappear from the navigation and radio screen. This may take up to 10 minutes.
3. Press and hold the "1" and "4" buttons on the radio simultaneously for several seconds until "000" appears on the screen.
4. Use the "TUNE" knob to enter the code that was provided with the vehicle's owner's manual. If you don't have the code, you will need to contact a Cadillac dealership or a certified mechanic to retrieve it for you.
5. Once you entered the correct code, press the "AM/FM" button to unlock the radio and navigation system.

If all doesn't work, it's time to contact a Cadillac dealership or a certified mechanic to help you sort it out.

Hi Lisa Apart from taking it to a dealer. I would disconnect the battery for 15 minutes then reconnect the battery and try again. Like our computers some times things freeze and need to be powered down for things to reset. The only issue the radio will have is, it will require a security code to reset the radio after. Hopefully you should have that somewhere, if you don't have the code your local dealer should be able to help. With the captiva there are only about 12 codes and I'm sure the dealer has them listed somewhere. Good luck.

Chris, they had a few problems with Escalade nav,/radio usually expensive fix and sometimes doesn't last, a lot of people end up going aftermarket.

Check the fuses!

Check the display settings, try resetting your nav to factory settings if that didn't help, you have to visit the dealer due to programing issue or software issue.
good luck

I find my code in the glove box.

Unless you can remember the security code that was originally entered, you will have to take it to the dealer and have them reset it for you. The dealer will have a generic unlock code for your vehicle.
Good luck.
regards,

Your radio/nav system needs a code. Go the your dealer's parts department , give them the VIN of your car( should be free $0). Punch in the code through the car radio and your radio/nav system should work right away.

go ther dealer or buy another radio

Your navigation code and radio codes writed on stikers on glovebox. Just open your glovebox and look on left side of gloivebox, not inside but outside. Open glovebox and look on left side. On my 2005 Acura RL NAV and Radio codes is different but it both on glove box. Sometime you even need to remove your glovebox cover to see those codes.