1995 GMC Yukon Owner's Manual - Page 457

Maintenance Schedule II - Diesel Engines 0 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 the United States. in I 17 Check the air intake system installation to assure that gaskets are properly sealed and that a11 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 replacedamaged parts as necessary. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. hoses and ducts for proper hook-up (or every I2 months, whichever occurs first).Be sure the valve works properly. This is a Noise Emission Control Service. Applicable only vehicles sold in the to United States. 0 If your engine has a thermostatically controlled cooling fan, inspect all 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 'i:'i: DATE ACTUAL MILEAGE SERVICED BY: rj 55,000 Miles (88 000 km) Change engine o i l and filter (or every 3 months, whichever OCCUPS first). An Etnission C m t d Serlic-e. Lubricate the front suspension, king pin bushings: steering linkage, transmission shift linkage, transfer case shift linkage, parking brake cable guides. rear driveline center splines,front axle propshaft splines, brake pedal springs and clutch pedal springs. Ball joints and king pin bushings should not be lubricated unless their temperature is IO" F (-12" C), or higher. When weather is cold. let the ball joints and king pin bushings warm up before lubrication or they could be datnaged. Perform each of the listed lubrication service items at this mileage interval (or every 12 months, whichever occurs first). (Corztinuecl) 7-89