Cars are getting harder and harder to break into. This can be seen as a good thing or a bad thing depending on your situation. For instance: I have the best commercial van on the market, a Chevy Express, and it requires a chipped key. I can cut a key exactly the same as my key, and it will turn on the lights, radio, open the doors...Everything but start the car! DOH!
Here's the lowdown on MOST transponder keys: You don't program the key, you program the vehicle! You can go to your dealer and they will charge you $200 to copy the current transponder, home depot will
do it for around $100, OR you can simply teach your vehicle to recognize both!
Step 1: Get a transponder key that will fit your vehicle. The B111-PT fits my Chevy Express.
Step 2: Take your key blank to a key cutting station/locksmith/etc and have them cut the blank
Step 3: Take the old key and turn the ignition to ON for 5 seconds.
Step 4: Turn the ignition to OFF and within the next 5 seconds, replace with new key and turn to the ON position for another 5 seconds.
Step 5: Turn the ignition back to OFF and remove the key.
The vehicle should now be programmed to the new key! If it doesn't work, repeat steps 3-5.
If you DON'T have a Chevy, you can still find a key that will work using the
Ilco key cross reference database
How to program your car by http://www.programautokeys.com/