Cadillac CT6 (USA / CAN)

Automatic transmission fluid capacity & service interval

Cadillac CT6 (USA / CAN) automatic transmission fluid capacity ranges from 7,7 to 11,5 liters. The service interval is 45000 miles. The data covers 2 configurations.

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

TypeSpecifications
CT6 2.0 VVT (2018-2020)
  • Use: Normal
  • Capacity 11-11,5 liter (Overhaul capacity)
  • Capacity 7,7 liter (Service fill)
  • Code: Hydra-Matic 10L 10/1
CT6 2.0 VVT (2018-2020)
  • Use: Severe
  • Capacity 11-11,5 liter (Overhaul capacity)
  • Capacity 7,7 liter (Service fill)
  • Change 45000 miles
  • Code: Hydra-Matic 10L 10/1

Additional Notes

  • The Cadillac CT6 2.0 VVT carries two distinct automatic transmission fluid capacity figures: an overhaul capacity of 11 to 11.5 liters and a service fill capacity of 7.7 liters.
  • The 7.7-liter service fill figure reflects the amount of fluid replaced during a routine drain-and-fill procedure, where residual fluid remains in the torque converter and valve body.
  • The overhaul capacity of 11 to 11.5 liters represents the total system volume, applicable when the transmission is fully disassembled and all fluid is evacuated from every internal component.
  • Under severe use conditions, the 2.0 VVT automatic transmission fluid carries a change interval of 45,000 miles, while no mileage interval is specified for normal use conditions.
  • Both the normal and severe use rows share identical capacity figures, meaning the 7.7-liter service fill and 11 to 11.5-liter overhaul values apply regardless of operating condition classification.

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