1995 GMC Yukon Owner's Manual - Page 453

Maintenance Schedule II - Diesel Engines 0 Replace air cleaner filter. A11 E~~li.v.~ion Coutr-ol SI-rvicp. 0 For 2-Wheel Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). I 0 Replace fuel filter. Replace filter sooner if it is clogged.? 0 Inspect shields and underhood insulation for damage or looseness. Adjust or replace a s required. This is a Noise Emission Control Service. Applicable onlyto 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, 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 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 rear/front axle fluid level and add fluid a s needed. Check constant velocity joints and axle seals for leaking. '!''I: I DATE I ACTUALMILEAGE I SERVICED BY: I 7-85