Cadillac CT6 (EU)

Coolant capacity & service interval

Cadillac CT6 (EU) coolant capacity ranges from 3,2 to 13,2 liters. Service intervals include checks every 15000 km or 12 months and changes every 250000 km or 60 months. The data covers 2 configurations.

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

TypeSpecifications
CT6 3.0 AWD Twin Turbo (2017-2019)
  • Use: Normal
  • Capacity 10,6-11,5 liter
  • Capacity 12,3-13,2 liter (+ rear airconditioning)
  • Capacity 3,2 liter (Cooling system, intercooler)
  • Check 15000 km/ 12 months
  • Change 250000 km/ 60 months
CT6 3.0 AWD Twin Turbo (2016-2017)
  • Use: Normal
  • Capacity 10,6-11,5 liter
  • Capacity 12,3-13,2 liter (+ rear airconditioning)
  • Capacity 3,2 liter (Cooling system, intercooler)
  • Check 15000 km/ 12 months
  • Change 250000 km/ 60 months

Additional Notes

  • The Cadillac CT6 3.0 AWD Twin Turbo carries a base cooling system capacity of 10.6 to 11.5 liters, with the range reflecting normal fill variation across the system.
  • When the rear air conditioning option is present, the coolant capacity rises to 12.3 to 13.2 liters, accounting for the additional heat exchanger circuit that rear climate systems introduce.
  • A separate intercooler cooling circuit holds 3.2 liters, which is independent of the main engine cooling loop and serves the twin-turbocharged induction system.
  • The coolant check interval is set at 15,000 km or 12 months under normal use conditions, whichever comes first.
  • The coolant change interval extends to 250,000 km or 60 months under the same normal use condition, placing it among the longer-cycle coolant service schedules typical of modern long-life formulations.
  • Both the 2016-2017 and 2017-2019 CT6 3.0 AWD Twin Turbo configurations share identical capacity figures and service intervals, indicating no specification change was introduced across those production periods.

Other Systems