1995 Chevrolet Suburban Owner's Manual - Page 454

I Maintenance Schedule II - Diesel Engines (Continued) 0 Replace air cleaner filter. An Emission Control Service. 0 For 2-Wheel Drive vehicles only:Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0 Check the crankcase depression regulatorvalve system for any worn, plugged or collapsedhoses. See servicemanual. An Emission Control Service. 0 Replace fuel filter. Replace filter sooner if it is clogged.? 0 Check the EGR System (if equipped) (except CodeF engine) as described in the service manual. An Emission Control Service. 0 Inspect accessory drive (serpentine) belt for cracks, frayingand wear and check belt for proper tension. Adjust or replace belt as needed. An Emission Control Service. 0 Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required. This isa Noise Emission Control Service. Applicable only to vehicles soldin 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 are tight.Also check to be sure that the air cleanerhousing is properly seated, the cover fits tightly and the wing nuts are tight. Tighten connections and fasteners or replace damaged parts as necessary. This isa Noise Emission Control Service. Applicable only to vehicles sold in the United States. 0 If your engine has a thermostatically controlled cooling fan, 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 in the United States. 0 Check the exhaust pressure regulator valve for proper operation; correct any binding. Inspect hoses for cracks, chafing or decay. Replace parts as needed. An Emission Control Service. 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. **