1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 386

yellowblue Scheduled Maintenance -- Gasoline Engines 45,000 Miles (75 000 km) (Continued) Lubricate chassis components (or at each engine oil and filter change). (See footnote #.) If Equipped: Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) j j j j 50,000 Miles (83 000 km) j Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90_F (32_C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). DATE ACTUAL MILEAGE SERVICED BY: 7-10