Cadillac CT6 (USA / CAN)

Transfer case fluid capacity & service interval

Cadillac CT6 (USA / CAN) transfer case fluid capacity is 0,8 liter. Service intervals include 45000 miles and 97500 miles. The data covers 12 configurations.

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

TypeSpecifications
CT6 4.2 AWD Twin Turbo (2019-2020)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 4.2 AWD Twin Turbo (2019-2020)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles
CT6 4.2 AWD Twin Turbo (2018-2020)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 4.2 AWD Twin Turbo (2018-2020)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles
CT6 3.0 AWD Twin Turbo (2017-2020)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 3.0 AWD Twin Turbo (2017-2020)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles
CT6 3.6 AWD (2017-2020)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 3.6 AWD (2017-2020)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles
CT6 3.0 AWD Twin Turbo (2016-2017)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 3.0 AWD Twin Turbo (2016-2017)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles
CT6 3.6 AWD (2016-2017)
  • Use: Normal
  • Capacity 0,8 liter
  • Change 97500 miles
CT6 3.6 AWD (2016-2017)
  • Use: Severe
  • Capacity 0,8 liter
  • Change 45000 miles

Additional Notes

  • The Cadillac CT6 transfer case fluid capacity is 0.8 liter across all listed AWD configurations, covering the 3.6, 3.0 Twin Turbo, and 4.2 Twin Turbo engines. A consistent capacity of this size is typical of a compact, electronically controlled transfer case unit used in car-based AWD platforms rather than truck-style part-time systems.
  • The 0.8 liter figure represents a service fill capacity, meaning the amount of fluid required during a drain-and-fill service. Transfer case overhaul capacities, which account for residual fluid in internal passages and components, are generally higher than service fill values.
  • Under normal use conditions, the transfer case fluid change interval is 97,500 miles for all listed CT6 AWD configurations. Normal use in this context refers to everyday driving that does not consistently expose the drivetrain to elevated stress or contamination.
  • Under severe use conditions, the change interval drops to 45,000 miles across all listed configurations. Severe use classifications typically apply to driving patterns such as frequent towing, off-road operation, repeated short trips, or sustained high-temperature environments, all of which accelerate fluid degradation.
  • The 97,500-mile normal interval and 45,000-mile severe interval represent a more than 2:1 ratio between the two service schedules. This gap reflects how significantly operating conditions can affect the rate at which transfer case fluid loses its lubricating and protective properties.
  • The 3.0 AWD Twin Turbo and 3.6 AWD configurations both carry entries spanning 2016-2017 and 2017-2020, with identical capacity and interval values across both date ranges. The 0.8 liter capacity and the 97,500-mile normal and 45,000-mile severe intervals remain unchanged between the two overlapping entry sets.
  • The 4.2 AWD Twin Turbo entries begin with the 2018-2020 range, reflecting a later introduction compared to the 3.0 and 3.6 AWD variants, which are listed from 2016. Despite the different engine displacement and introduction year, the 4.2 Twin Turbo shares the same 0.8 liter transfer case capacity and identical service intervals.

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