2000 GMC Sierra 1500 Pickup Owner's Manual - Page 394

yellowblue Scheduled Maintenance 97,500 Miles (162 500 km) j Lubricate chassis components (or every 12 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. 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: j Inspect spark plug wires. An Emission Control Service. j Replace spark plugs. An Emission Control Service. 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. 100,000 Miles (166 000 km) DATE ACTUAL MILEAGE SERVICED BY: 7-16