i dont get any response when i turn the key and i have a new battery
Make sure all your battery connections and grounds are clean and tight. Make sure your new battery actually has a charge on it. (Do other electrical systems work?) After that I would suspect the starter, but there are a bunch of electrical components in modern cars that can also fail, so trouble shoot it properly before starting to buy and replace random parts.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts