GMC Duramax Diesel 2015 Owner's Manual page 112

Usage
Automatic Transmission
Key Lock Cylinders
Pickup Models: Floor Shift Linkage
Chassis Lubrication
Van Models: Front Wheel Bearings
Van Models: One-Piece Propshaft
Slip Yoke Spline, Two-Piece
Propshaft Slip-in-Tube Spline
Pickup Models: Front Axle Propshaft
Spline
Pickup Models: Rear Driveline Center
Spline
®
DEXRON -VI Automatic Transmission Fluid.
Allison Transmission Only: For areas where ambient temperatures are
below -40 °C (-40 °F) use Synthetic Transmission Fluid approved to Allison
Transmission specification TES-295 (GM Part No. 12378515, in
Canada 88900701).
Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Lubriplate Lubricant Aerosol (GM Part No. 89021668, in Canada 89021674)
or lubricant meeting requirements of NLGI #2 Category LB or GC-LB.
Chassis Lubricant (GM Part No. 12377985, in Canada 88901242) or
lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Wheel bearing lubricant meeting requirements of NLGI #2, Category GC or
GC-LB (GM Part No. 1051344, in Canada 993037).
Spline Lubricant, Special Lubricant (GM Part No. 19257121, in
Canada 19257122).
Spline Lubricant, Special Lubricant (GM Part No. 19257121, in
Canada 19257122).
Chassis Lubricant (GM Part No. 12377985, in Canada 88901242) or
lubricant meeting requirements of NLGI #2, Category LB or GC-LB.
Service and Maintenance
Fluid/Lubricant
11-9