1995 GMC Yukon Owner's Manual - Page 409

Maintenance Schedule I - Gasoline Engines Heavy Duty Emissions (Continued) 0 Adjust timing to underhood label specifications. Inspectthe inside and outside of the distributor cap and rotor for cracks,carbon tracking and corrosion. Clean or replace as needed. An Emission Control Service. This is a Noise Emission Control Service. 0 If your vehicle has a thermostatically controlled aircleaner, inspect all hoses and ducts for properhook-up. Be sure the valve works properly. An Enlission Control Service. This is a Noise 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 Esnission Control Service. 0 Inspect shields and underhood insulation for damage or looseness. Adjust or replace as 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, fastenersand 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 I2 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. DATE ACTUAL MILEAGE SERVICED BY: 7-4 1