1997 GMC Savana Van Owner's Manual - Page 316

Short TripKity Maintenance Schedule Gasoline Engines -- J 18,000 Miles (30 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Sewice. (35 000 km) 1 21,000 Miles oil and filter (or every 0Change engine 3 months, whichever occurs first). An Emission Control Service, 0Lubricate chassis components (or every 3 months, whichever occursfirst). (See footnote #.) 0Check axle fluid level and add fluid as needed. (See footnote **.) 0Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rotation pattern and additional information. (See footnote +.) DATEMILEAGE ACTUAL SERVICED BY: Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0Check axle fluid level and add fluid as needed. (See footnote * *.) DATEMILEAGE ACTUAL SERVICED BY 7-12