1995 Chevrolet Suburban Owner's Manual - Page 442

I Maintenance Schedule I - Diesel Engines I7 Inspect accessory drive (serpentine)belt for cracks, fraying and wear and check belt for proper tension. Adjust or replacebelt as needed. An Emission ControlService. 0 Inspect shields andunderhood insulation for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicableonly to vehicles sold in the United States. 0 Check the air intake system installation to assure that gaskets are properly sealed and that all hose connections, fastenersand other components aretight. Also check to be sure that the air cleanerhousing is properly seated, the coverfits tightly and the wing nuts are tight. Tighten connections and fasteners orreplace damaged parts as necessary. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. [J If your engine has a thermostatically controlled cooling fan, inspect all hoses and ducts for properhook-up (or every 12 months, whichever occurs first).Be sure thevalve works properly. This is a Noise to vehicles sold in the Emission Control Service. Applicable only United States. correct any binding. Inspecthoses for cracks, chafingor decay. Replace parts as needed. An Emission Control Service. 0 Check the exhaust pressure regulatorvalve for proper operation; 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. ** 7-79