Owner's Manual
Page 395
...or GC-LB. with Standard Differential Only) Multi-Purpose Lubricant, SuperlubeR (GM Part No. 12346241 or equivalent). 7-56 DEXRONR-III Automatic Transmission Fluid. USAGE Chassis Lubrication FLUID/LUBRICANT Chassis Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, ...Part No. 1051515) or equivalent. Rear Axle SAE 80W-90 Axle Lubricant (2500 and (GM Part No. 1052271 3500 Series or equivalent). Front Wheel Bearings Power Steering System Automatic Transmission Key Lock Cylinders Rear Axle SAE 75W-90 Synthetic (1500 Series Only) Axle ...
...or GC-LB. with Standard Differential Only) Multi-Purpose Lubricant, SuperlubeR (GM Part No. 12346241 or equivalent). 7-56 DEXRONR-III Automatic Transmission Fluid. USAGE Chassis Lubrication FLUID/LUBRICANT Chassis Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, ...Part No. 1051515) or equivalent. Rear Axle SAE 80W-90 Axle Lubricant (2500 and (GM Part No. 1052271 3500 Series or equivalent). Front Wheel Bearings Power Steering System Automatic Transmission Key Lock Cylinders Rear Axle SAE 75W-90 Synthetic (1500 Series Only) Axle ...