| Back | ||||
| Model | Years | Speeds | Drive Train | Trans Model |
| CT6 Base, Luxury, Platinum, Premium Luxury, Sport | 2016-2018 | 8 Spd | RWD, AWD 2.0L L4 Turbo, 3.0L V6 Turbo, 3.6L V6 | 8L45, 8L90 |
| CT6 Plug-In | 2017-2018 | EV | RWD 2.0 Liter L4 Turbo PLUG-IN HYBRID EV-Gas (PHEV) LTG | 4EL70 |
| CT6 Luxury, Platinum, Premium Luxury, Sport | 2019-20 | 10 Spd | RWD, AWD 2.0L L4 Turbo, 3.0L V6 Turbo, 3.6L V6 | 10L80 |
| CT6 Luxury, Platinum, V | 2019-2020 | 10 Spd | AWD 4.2L V8 Turbo | 10L90 |