Cadillac CT6
Maintenance specs for 3 variants of the Cadillac CT6 — from 2016 to 2020.
2016–2020 Cadillac CT6
2.0L Turbo I4 (LTG) · RWD
265 hp / 295 lb-ft
Transmission
Type8-Speed Automatic (8L45)
FluidDexron HP
Drain & fill5 qt
Full capacity10 qt
Power Steering
TypeElectric (no fluid)
Differentials
Rear fluid75W-90 Synthetic GL-5
Fuel
Tank19 gal
TypePremium 91
Service Intervals
Oil change7,500 mi
Trans service45,000 mi
Coolant flush150,000 mi
Spark plugs60,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Cabin filter22,500 mi
Drive belt100,000 mi
2016–2020 Cadillac CT6
3.6L V6 (LGX) · AWD
335 hp / 284 lb-ft
Transmission
Type8-Speed Automatic (8L45)
FluidDexron HP
Drain & fill5.5 qt
Full capacity10.5 qt
Power Steering
TypeElectric (no fluid)
Differentials
Front fluid75W-85 Synthetic
Rear fluid75W-90 Synthetic GL-5
Fuel
Tank19 gal
TypePremium 91
Service Intervals
Oil change7,500 mi
Trans service45,000 mi
Coolant flush150,000 mi
Spark plugs97,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Cabin filter22,500 mi
Drive belt100,000 mi
2019–2020 Cadillac CT6
4.2L Twin-Turbo V8 (LTA) · AWD
550 hp / 627 lb-ft
Transmission
Type10-Speed Automatic (10L80)
FluidDexron HP
Drain & fill6 qt
Full capacity12 qt
Power Steering
TypeElectric (no fluid)
Differentials
Front fluid75W-85 Synthetic
Rear fluid75W-90 Synthetic GL-5
Transfer Case
FluidAutotrak II
Fuel
Tank19 gal
TypePremium 93
Tires
Size245/40R20 front / 275/35R20 rear
Pressure (front)36 PSI
Pressure (rear)36 PSI
Shop 245/40R20 front / 275/35R20 rear tiresService Intervals
Oil change7,500 mi
Trans service45,000 mi
Coolant flush150,000 mi
Spark plugs60,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Cabin filter22,500 mi
Drive belt100,000 mi