1999 Chevrolet Tahoe Owner's Manual - Page 366

yellowblue Short Trip/City Scheduled Maintenance -- Gasoline Engines j Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. j Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) j Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 48,000 Miles (80 000 km) DATE ACTUAL MILEAGE SERVICED BY: 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: 7-16