GMC Sierra, GMT K2CG/EG/HG/RG (USA / CAN)

AdBlue (DEF) capacity & service interval

GMC Sierra, GMT K2CG/EG/HG/RG (USA / CAN) uses AdBlue (DEF) with a capacity of 26,5 liters. The data covers 1 configuration.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Sierra 6.6 Duramax V8 DPF (332 kW) (2016-2019)
  • Use: Normal
  • Capacity 26,5 liter

Additional Notes

  • The GMC Sierra 6.6 Duramax V8 DPF (332 kW), covering model years 2016-2019, carries an AdBlue (DEF) tank capacity of 26.5 liters. A tank of that size is notably large for a pickup application, reflecting the volume of diesel exhaust fluid consumed relative to fuel over extended driving cycles under normal use conditions.
  • The 26.5-liter figure represents the total fluid capacity of the exhaust aftertreatment system reservoir. In DEF system terminology, this is a fill capacity rather than a partial service quantity, meaning the full volume is relevant when the tank is run down and refilled rather than topped off incrementally.
  • The specification is tied to a normal use condition, which in fluid service contexts refers to standard on-road driving as opposed to severe-duty cycles involving sustained heavy loads, frequent short trips, or extreme temperatures. The 26.5-liter capacity applies under that normal classification for the 2016-2019 model year range.

Other Systems