GMC Repair: Keyless Entry, chevy silverado, horn sounds

Question
We just bought a 2000 Chevy Silverado.  Within the first 2 hours we got locked out. It did not come with the keyless entry keychain, however it does have that option.  We have an old keyless entry keychain can it be reprogrammed to our new truck or not?

Answer
Possibly, but probably not. I would see your local dealer parts department, they would be able to check the part number to see if it matches your trucks system.

Once you know if it works or you purchase a new one, this is how you program it:

1. Get in the truck with the doors closed.
2. Hold down the unlock button on the door.
3. Turn the key from on to off 3 times without cranking the motor or until the horn sounds and the locks cycle.
4. After the locks cycle then release the unlock button.
5. Hold the lock AND unlock button down on the remote until the lock cycle, this should not take longer than 30-45 seconds.
6. Once all remotes are programmed turn the key on and the programming mode will end.