2004 GMC Sierra 1500 Pickup Owner's Manual - Page 551

Usage Manual Transmission (5-Speed without Low Gear, RPO MG5) Manual Transmission (6-Speed) Automatic Transmission Key Lock Cylinders Floor Shift Linkage Fluid/Lubricant Synchromesh Transmission Fluid (GM Part No. U.S. 12345349, in Canada 10953465). TranSynd™ Synthetic Transmission Fluid (GM Part No. U.S. 12378515, in Canada 88900701). DEXRON®-III Automatic Transmission Fluid. Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474). Lubriplate Lubricant Aerosol (GM Part No. U.S. 12346293, in Canada 992723) or lubricant meeting requirements of NLGI #2 Category LB or GC-LB. Usage Chassis Lubrication Front Axle Rear Axle Rear Axle (Steerable) Manual Transfer Case Fluid/Lubricant Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) 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). SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115. Synthetic Axle Lubricant; use only GM Part No. U.S. 12378557, in Canada 88901362. Do not add friction modifier. DEXRON®-III Automatic Transmission Fluid. 6-15