1998 GMC Sonoma Owner's Manual - Page 335

I ShortTrip/CityMaintenanceSchedule I 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals forleaking. (See footnote **.) Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 27,000 Miles (45 000 km) Change engine oil and filter (or every 3 months, whichever occurs first). An Emissiorz Control Service. DATE I ACTUAL MILEAGE I SERVICEDBY I 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 **.) 30,000 Miles (50 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. DATE ACTUAL MILEAGE I SERVICED B Y 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 for leaking. (See footnote **.) (Continued) 7-13