They're included under the 6.6 specific parts list.
6.6L Duramax Diesel Engine Components
For trucks equipped with a 6.6L Duramax Diesel Engine, the complete engine assembly, including turbocharger components, is covered for defects in material or workmanship for 5 years or 100,000 miles, whichever comes first.
. Cylinder block and heads and all internal parts, intake and exhaust manifolds, timing gears, timing gear chain or belt and cover, flywheel, harmonic balancer, valve covers, oil pan, oil pump, water pump, fuel pump, engine mounts, seals, and gaskets
. Diesel Fuel Metering System: injection pump, nozzles, high pressure lines, and high pressure sealing devices
. Glow Plug Control System: control/glow plug assembly, glow plugs, cold advance relay, and Engine Control Module (ECM)
. Fuel injection control module, integral oil cooler, transmission adapter plate, left and right common fuel rails, fuel filter assembly, fuel temperature sensor, and function block
Important: Some of these components may also be covered by the Emission Warranty. See Emission Warranty Parts List on page 28 for details.