2001 GMC Sierra 1500 Pickup Owner's Manual - Page 451

USAGE Automatic Transmission Key Lock Cylinders Floor Shift Linkage FLUID/LUBRICANT Transmission Fluid. DEXRONR-III Automatic Multi-Purpose Lubricant, SuperlubeR (GM Part No. 12346241 or equivalent). USAGE Rear Axle FLUID/LUBRICANT SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 12378261) or equivalent meeting GM Specification 9986115. DEXRONR-III Automatic Transmission Fluid. AUTO-TRAK II Fluid (GM Part No. 12378508). Spline Lubricant, Special Lubricant (GM Part No. 12345879) or lubricant meeting requirements of GM 9985830. LubriplateR Lubricant Aerosol (GM Part No. 12346293 or equivalent) or lubricant meeting requirements of NLGI # 2 Category LB or GC-LB. Chassis Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB. Manual Transfer Case Automatic Transfer Case Front Axle Propshaft Spline or One-Piece Propshaft Spline (Two-Wheel Drive with Auto. Trans.) Chassis Lubrication Front Axle SAE 80W-90 Axle Lubricant (GM Part No. 1052271 or equivalent). 7-26