1997 GMC Suburban Owner's Manual - Page 374

Short TriplCity Maintenance Schedule -- Gasoline Engines 51,000 Miles (85 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An EmissionControl Service. 54,000 Miles (90 000 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 * *.) Cl Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0Check readfiont axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leakmg. (See footnote **.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE ACTUAL MILEAGE SERVICED BY: 7-18