2014 Chevrolet Silverado 3500 HD Crew Cab Owner Manual - Page 468

11-2 Service and Maintenance The Additional Required Services Severe are for vehicles that are: . Proper vehicle maintenance helps to keep the vehicle in good working condition, improves fuel economy, and reduces vehicle emissions. Because of the way people use vehicles, maintenance needs vary. There may need to be more frequent checks and services. The Additional Required Services Normal are for vehicles that: . { Warning Performing maintenance work can be dangerous and can cause serious injury. Perform maintenance work only if the required information, proper tools, and equipment are available. If they are not, see your dealer to have a trained technician do the work. See Doing Your Own Service Work on page 10-3. Mainly driven in heavy city traffic in hot weather. Mainly driven in hilly or mountainous terrain. Frequently towing a trailer. Used for high speed or competitive driving. Used for taxi, police, or delivery service. . . . Carry passengers and cargo within recommended limits on the Tire and Loading Information label. See Vehicle Load Limits on page 9-15. Are driven on reasonable road surfaces within legal driving limits. Use the recommended fuel. See Recommended Fuel on page 9-68. . . Refer to the information in the Maintenance Schedule Additional Required Services - Severe chart. . Refer to the information in the Maintenance Schedule Additional Required Services - Normal chart.