Owner's Manual
Page 412
... Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB. USAGE Rear Driveline Center Spline and Universal Joints Constant Velocity Universal Joint FLUID/LUBRICANT Chassis Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB. AUTO-TRAK II...
... Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB. USAGE Rear Driveline Center Spline and Universal Joints Constant Velocity Universal Joint FLUID/LUBRICANT Chassis Lubricant (GM Part No. 12377985 or equivalent) or lubricant meeting requirements of NLGI # 2, Category LB or GC-LB. AUTO-TRAK II...