2007 Pontiac G5 Noise while stopping

I drive a '07 Pontiac G5 with about 102,000 miles. Whether I am in gear (manual) or not, as I come to a stop I hear a single 'bang/knock'. It doesn't repeat over and over as I am braking, just happens one time. As I move forward from my stop there is no sound, it just happens when I am coming up to the stop. Any ideas what would be causing this? It just recently had new brakes put on (rotors and pads) so I know it isn't due to worn brakes. I'm not sure if something in the suspension would cause this so I am looking for suggestions.