1995 GMC Yukon Owner's Manual - Page 447

Maintenance Schedule I - Diesel Engines (Continued) 0 Inspect accessory drive (serpentine)belt for cracks, fraying and wear and check belt for proper tension.Adjust or replace belt a s needed. A?? Emission Control Service. Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. 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, the cover fits tightly and the wing nuts are tight. 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. 0 If your engine has a thermostatically controlled cooling fm, inspect all 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 the in United States. 17 Check the exhaust pressure regulator valve for proper operation; correct any binding. Inspect hoses for cracks, chafing or decay. Replace parts as needed. An Emissio1? Cor~tt-01 Service. 0 Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals forleaking. :t:$ r DATE ACTUAL MILEAGE SERVICED BY: ~~ I ~. 7-79