WARNING: Please make sure your actual working key has the letters "PK3" stamped on the blade (Not Compatible with "PK3+"). If your actual working key has stamped the letters "PK3+" instead of "PK3", this key will NOT work in your car.

This is about 2 (TWO) new uncut transponder keys.
You will need to take your actual working key with this new item to a professional locksmith shop or the dealership to get it cut to fit your car's locks.
Once you have the key cut, you'll need to get it programmed to your car.
That could be done by yourself. All you need to have is one working key to do it.
With the item you'll receive the programming instructions. Is a very easy procedure you can follow step by step.

It fits:

(2005-2009) Pontiac Montana