1997 GMC Sonoma Owner's Manual - Page 338

Short Trip/City Maintenance Schedule z 72,000 Miles (120 000 km) (Continued) 75,000 Miles (125 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0Rotate tires. See "Tire Inspection and Rotation" in the Indexfor proper rotation pattern and additional information. (See footnote +.) 0Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0For Two-Wheel-Drive vehiclesonly: Clean and repack the front wheel bearings (or at each brake relining, whicheveroccurs first). DATE ACTUAL MILEAGE SERVICED BY: 7-28