1997 GMC Sonoma Owner's Manual - Page 325

I Short TripKity Maintenance Schedule I 0For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0Replace fuel filter. An Emission Control Service. (See footnote?.) 0Replace air cleaner filter. An Emission Control Service. 30,000 Miles (50000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0Lubricate 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 * *.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) I I 1 DATE ACTUAL MILEAGE SERVICED BY: 7-15