1999 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 391

yellowblue Scheduled Maintenance -- Gasoline Engines An Emission Control Service. (See footnote[.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) j Replace fuel filter. 97,500 Miles (162 500 km) j Check Oil Life Monitor. If engine oil and filter are changed, reset monitor. See "Engine Oil" in the Index. An Emission Control Service. (See footnote *.) j Lubricate chassis components (or at each engine oil and filter change). (See footnote #.) j Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE ACTUAL MILEAGE SERVICED BY: 100,000 Miles (166 000 km) j Inspect spark plug wires. An Emission Control Service. j Replace spark plugs. An Emission Control Service. (Continued) DATE ACTUAL MILEAGE SERVICED BY: 7-15