Thread: Key from dealer doesn't work - 2000 Grand Prix

No luck at the dealer by home either. Brought the glove box lock with me so I didn't have to take the key home and try it. Same behavior with the key (have to pull it out slightly to get it to turn the lock.) He was stumped. No charge for the failed keys and he went ahead and gave me the key code from GM. His only suggestion was a locksmith. He mentioned that typically the locksmith's equipment is more adjustable and they may have better luck getting a key to work.

I forgot to get copies but i did just come across this:

Program Your Own PK3 Keys.... - Cadillac Owners Group

Maybe it will help.