1996 GMC Sonoma Owner's Manual - Page 345

Part D: Recommended Fluids and Lubricants NOTE: Fluids and lubricants identified below by name, part number or specification may be obtained from your GM dealer. USAGE Coolant Supplement Sealer I FLUID/LUBRICANT GM Part No. 3634621 or equivalent with a complete flush and refill. ~ I USAGE Engine Oil I FLUIDLUBRICANT 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" in the Index. 50/50 mixture of clean water (preferably distilled)and GM Goodwrench@DEX-COOL or Havoline@DEX-COOL (orange-colored, silicate-free) antifreeze conforming to GM Specification 6277M. See "Engine Coolant" in the Index. TM TM Hydraulic Brake System ~ Delco Supreme I 1 Brake Fluid (GM Part No. 1052535 or equivalent DOT-3 brake fluid). @ Hydraulic Clutch Hydraulic Clutch Fluid (GM Part No. 12345347 or equivalent). System Power Steering System Manual Transmission Automatic Transmission Key Lock Cylinders GM Power Steering Fluid (GM Part No. 1052884 - 1 pt., 1 050017 - 1 qt., or equivalent). Synchromesh Transmission Fluid (GM Part No. 12345349 or equivalent). DEXRON@-I11 Automatic Transmission Fluid. Engine Coolant Multi-Purpose Lubricant, Superlube@(GM Part No. 12346241 or equivalent). 7-53