1997 GMC Sonoma Owner's Manual - Page 334

Short TripKity Maintenance Schedule 60,000 Miles (100 000km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0Inspect engine accessory drive belt. 0Replace fuel filter. An Emission Control Service. (See footnote?.) 0Replace air cleaner filter. An Emission Control Service. El 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 **.) 7-24