GMC Duramax Diesel 2015 Owner's Manual page 118

Transmission Fluid (Pan Removal and Filter Replacement)
8 Cylinder Engines
*Do not overfill the DEF tank. See Diesel Exhaust Fluid on page 9-13.
All quantities are approximate. When adding, be sure to fill to the appropriate level, as recommended in this
manual. Recheck fluid level after filling.
Engine Specifications
6.6L V8 Turbo Diesel (LGH Engine)
6.6L V8 Turbo Diesel (LML Engine)
Application
Engine
Technical Data
Capacities
Metric
7.0 L
VIN Code
L
8
12-3
English
7.4 qt
Type
V8
V8