Trailer hitches are divided into Classes by weight carrying and tongue weight capacity. Class I hitches normally, not in all instances, have a 2000 pound towing capacity and Class II hitches normally, not in all cases, have a 3500 pound towing capacity and a 300 to 350 pound tongue weight capacity. For your Grand Prix we have a Class II hitch, the Curt, item # C12225, that will allow you to select bike racks and towing products.
We have help article (see link) that explains hitch classes... view full answer...