Tri-State Truck Center, Inc. has been selling Class-8 trucks longer than any other company in our trade area. Founded in 1945 by F.A. Maddox, Sr., Tri-State Mack opened its doors with seven employees. Today, more than half a century later, Tri-State Truck Center, Inc. has grown to nine full-service branches and over 360 employees. We provide complete truck sales and leasing as well as parts, service and body shop services in Tennessee, Mississippi, Missouri, Arkansas and beyond.