2003 GMC Yukon Owner's Manual - Page 485

Part D: Recommended Fluids and Lubricants Fluids and lubricants identified below by name, part number or specification may be obtained from your dealer. Usage Fluid/Lubricant Engine oil with the American Petroleum Institute Certified for Gasoline Engines starburst symbol of the proper viscosity. To determine the preferred viscosity for your vehicle's engine, see Engine Oil on page 5-16. 50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant. See Engine Coolant on page 5-26. Delco Supreme 11 Brake Fluid or equivalent DOT-3 brake fluid. GM Optikleen® Washer Solvent or equivalent. GM Power Steering Fluid (GM Part No. U.S. 1052884, in Canada 993294, or equivalent). Usage Automatic Transmission Key Lock Cylinders Chassis Lubrication Front Axle (Four-Wheel Drive) Front Axle (All-Wheel Drive) Engine Oil Engine Coolant Hydraulic Brake System Windshield Washer Solvent Power Steering System Rear Axle Fluid/Lubricant DEXRON®-III Automatic Transmission Fluid. Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474, or equivalent). Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242, or equivalent) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB. SAE 80W-90 Axle Lubricant (GM Part No. U.S. 1052271, in Canada 10950849 or equivalent). SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) or equivalent meeting GM Specification 9986115. SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) or equivalent meeting GM Specification 9986115. 6-17