For pension and benefits questions, you may call the General Dynamics Service Center at 1-888-GD-BENEFITS (1-888-432-3633). General Dynamics Service Center representatives are available between the hours of 9 a.m. and 9 p.m. Eastern Time, Monday through Friday (except on certain holidays). If you are calling from outside the United States, dial the out-of-country access number followed by 1-847-883-1138.