1997 GMC Savana Van Owner's Manual - Page 346

Long TripMighway Maintenance Schedule -- Gasoline Engines I Only: Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required. This isa Noise Emission Control Service. Applicable only to vehicles sold in the United Stutes. 90,000 Miles (150 000 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Vehicles With GVWR Above8,500 lbs. 0Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0Check axle fluid level and add fluid as needed. (See footnote **.) 0Clean and repack thefront 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. 0Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper rota.tion pattern and additional information. (See footnote +.) I DATE I ACTUAL MILEAGE ISERVICED BY: I 7-42