Cadillac XTS (USA / CAN)

Automatic transmission fluid capacity & service interval

Cadillac XTS (USA / CAN) automatic transmission fluid capacity ranges from 6 to 9 liters. Service intervals occur every 45000 miles. Data covers 2 configurations.

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

TypeSpecifications
XTS 3.6 V6 (2018-2020)
  • Use: Normal
  • Capacity 9 liter (Overhaul capacity)
  • Capacity 6 liter (Service fill)
  • Code: Hydra-Matic 6T70 6/1
XTS 3.6 V6 (2018-2020)
  • Use: Severe
  • Capacity 9 liter (Overhaul capacity)
  • Capacity 6 liter (Service fill)
  • Change 45000 miles
  • Code: Hydra-Matic 6T70 6/1

Additional Notes

  • The Cadillac XTS 3.6 V6 automatic transmission carries a service fill capacity of 6 liters, which reflects the amount of fluid added during a routine drain-and-fill procedure without removing the transmission from the vehicle.
  • The overhaul capacity for the 2018-2020 XTS 3.6 V6 automatic transmission is 9 liters, representing the total fluid volume required when the transmission is fully disassembled and all fluid passages are emptied.
  • The 3-liter difference between the overhaul capacity and the service fill capacity indicates that a significant portion of fluid remains in the torque converter and valve body during a standard service, which is a common characteristic of automatic transmission fluid changes.
  • Under severe use conditions, the 2018-2020 XTS 3.6 V6 automatic transmission fluid carries a specified change interval of 45,000 miles, with service fill and overhaul capacities remaining identical to the normal use configuration at 6 liters and 9 liters respectively.
  • No fluid change interval is listed for the normal use condition on the XTS 3.6 V6, while the severe use condition carries an explicit 45,000-mile interval, reflecting the greater thermal and mechanical stress placed on automatic transmission fluid under demanding operating conditions.

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