Fluids and lubricants identified below by name, part number, or specification may be obtained from your dealer.
Usage | Fluid/Lubricant |
---|---|
Engine Oil (Gasoline Engine) | Engine oil which meets GM Standard GM6094M and displays the American Petroleum Institute Certified for Gasoline Engines starburst symbol. GM Goodwrench® oil meets all the requirements for your vehicle. To determine the proper viscosity for your vehicle's engine, see "Engine Oil" in the Index. |
Engine Oil (DURAMAX® Diesel Engine) | Engine oil with the letters CI-4 or CH-4 is best for your vehicle. The CI-4 or CH-4 designation may appear either alone or in combination with other API designations, such as API CI-4/SL. These letters show American Petroleum Institute levels of quality. To determine the preferred viscosity for your vehicle's diesel engine, see "Engine Oil" in the Index. |
Engine Oil (Caterpillar® Diesel Engine) | See the Caterpillar® Operation & Maintenance Manual for engine oil recommendations. |
Engine Coolant (Caterpillar® Diesel Engine) | See the Caterpillar® Operation & Maintenance Manual for engine coolant recommendations. |
Engine Coolant (Gasoline Engine & DURAMAX® Diesel) | 50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant. See Engine Coolant . |
Hydraulic Brake System | Delco® Supreme 11 Brake Fluid or equivalent DOT-3 brake fluid. |
Windshield Washer Solvent | GM Optikleen Washer Solvent. |
Clutch Bearing Lubricant | Clutch Bearing Lubricant (GM Part No. 12378484 or equivalent NLGI #3 consistency). |
Exhaust Brake Ball Joint Cap Lubricant | High-Temperature Grease (GM Part No. U.S. 1051344, in Canada 903037) or NLGI #3 consistency. |
Power Steering System | DEXRON®-VI Automatic Transmission Fluid. |
Manual Transmission (Except ZF 6-Speed) | Synthetic Manual Transmission Fluid (GM Part No. U.S. 12345724, in Canada 10953510). |
Manual Transmission (ZF 6-Speed) | Synthetic Transmission Fluid approved to Allison Transmission® specification TES-295 (GM Part No. U.S. 12378515, in Canada 88900701). |
Automatic Transmission | See the Allison Transmission® Operator's Manual for correct transmission fluid. |
Key Lock Cylinders | Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474). |
Chassis Lubrication | Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB. |
Front Wheel Bearings (Except Oil Filled Hubs) | Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB (GM Part No. U.S. 1051344, in Canada 993037). |
Front Wheel Bearings with Oil Filled Hubs | SAE 75W-90 Synthetic Axle Lubricant for Medium Duty Trucks (GM Part No. U.S. 89021675, in Canada 10953512). |
Transfer Case (Four-Wheel Drive) | DEXRON®-III Automatic Transmission Fluid. Look for "Approved for the H-Specification" on the label. |
Front Axle (Four-Wheel Drive) | SAE 75W-90 Synthetic Axle Lubricant for Medium Duty Trucks (GM Part No. U.S. 89021675, in Canada 10953512). |
Rear Axle and Rear Hubs | SAE 75W-90 Synthetic Axle Lubricant for Medium Duty Trucks (GM Part No. U.S. 89021675, in Canada 10953512). |
Rear Axle Shift Motor Lubricant | Refrigerant Oil (GM Part No. U.S. 5416939, in Canada 10953496). |
Propshafts and Splines | Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or GC-LB (GM Part No. U.S. 1051344, in Canada 993037). |
Cab -- Door Hinges and Latches | Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474). |
Weatherstrip Conditioning | Dielectric Silicone Grease (GM Part No. U.S. 12345579, in Canada 992887). |
Weatherstrip Squeaks | Synthetic Grease with Teflon, Superlube (GM Part No. U.S. 12371287, in Canada 10953437). |