2000 GMC Savana Van Owner's Manual - Page 369

yellowblue Long Trip/Highway Scheduled Maintenance j Replace engine air cleaner filter. An Emission Control Service. j Vehicles With GVWR Above 10,000 lbs. Only: Inspect shields for damage or j j j looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) Diesel Engine Only: Check the air intake system installation to assure that gaskets are properly sealed and that all hose connections, fasteners and other components are tight. Also check to be sure that the air cleaner housing is properly seated and the cover fits tightly. Tighten connections and fasteners or replace damaged parts as necessary. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. Diesel Engine Only: If your engine has a thermostatically controlled cooling fan, inspect hoses and ducts for proper hook-up (or every 12 months, whichever occurs first). Be sure the valve works properly. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. 7-45