1998 GMC Sonoma Owner's Manual - Page 334

rSh&t TripKity Maintenance Schedule 18,000 Miles (30 000 km) I DATE 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) Check readfront axle fluidlevel and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote**.) 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) I 21,000 Miles (35 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission. Control Service. 0 Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals forleaking. (See footnote**.) DATE MILEAGE 1 24,000 Miles (40 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) DATE MILEAGE I 7-12