1997 GMC Sonoma Owner's Manual - Page 340

I Short Trip/City Maintenance Schedule I 81,000 Miles (135 800 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 78,000 Miles (130 000 km) (Continued) 0Check readfront axle fluid level and add fluid as needed. Checkconstant velocity joints and axle seals for leaking. (See footnote **.) 17 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) I7 Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) DATE ACTUAL MILEAGE SERVICED BY: DATE ACTUAL MILEAGE SERVICED BY: 7-30