Information on GNC in Clarkston, MI 48348 Outlet Note Regular Brands GNC Michigan Clarkston 326099 Rating 4.7 based on 97 votes Address 5751 Clarkston Road Clarkston, MI 48348 Phone Hours may vary in different stores. For accurate hours, please contact each store directly. Suite643 Hours may vary in different stores. For accurate hours, please contact each store directly. Nearby GNC Outlet GNC Outlet - Auburn Hills GNC Outlet - Auburn Hills GNC Outlet - Bloomfield Hills GNC Outlet - Bloomfield Hills People Also Viewed