How do i contact fleet customer service? Our highly trained business analysts can provide assistance in the following areas by calling 1-800-34-FLEET (800-343-5338) (Mon – Fri 8:30am – 5:00pm Eastern Time): When contacting our center, please have the following information available: Have a fleet-related question? Mon - Fri 8:30 am - 5:00 pm Eastern Time.How do i contact the fleet action center? The Fleet Action Center can help with your account inquires, incentives, orders management, vehicle logistics and service questions. Speak with an experienced professional Monday through Friday, 8 AM to 6 PM at 1-800-FLEETOP (1-800-353-3867). CHAT WITH A VEHICLE SPECIALISTWhy partner with national fleet services? Now let us help you too! When you partner with National Fleet Services you are pointing your company in the direction of prosperity and growth. Letting us handle the back office aspects of your business gives you more time to focus on your clients and the services you offer them.Where can i find more information about fleet management? Learn More Visit our Frequently Asked Questions page to learn more about Fleet Management. call 1-800-325-8838 . Need more assistance? Call 1-877-233-5338 .