1998 GMC Sonoma Owner's Manual - Page 332

I Short TripKity MaintenanceSchedule I DATE 9,000 Miles ( I 5 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). A n Emission Control Service. 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 for leaking. (See footnote 'i'*.) I 12,000 Miles (20 000 km) I7 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. [7 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 for leaking. (See footnote *:ic.) 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE MILEAGE I 15,000 Miles (25 000 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 I 7-10