1997 GMC Suburban Owner's Manual - Page 390

I I Long Tripmighway Maintenance Schedule-- Gasoline Engines 37,500 Miles (62 500 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 45,000 Miles (75 000 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Lubricate chassis components (or every 12 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 +.) DATE 0Lubricate chassis components (or every 12 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 **.) ACTUAL MILEAGE SERVICED BY: 7-34