2018 Cadillac CT6
US · Large Cars
The 2018 Cadillac CT6 is listed in the US market. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 2.0L 4-cylinder turbocharged (SIDI), 3.0L 6-cylinder turbocharged (SIDI), 3.6L 6-cylinder (SIDI), 2.0L 4-cylinder turbocharged (SIDI; PHEV)
- Transmission
- 8-speed automatic
- Drivetrain
- Varies by configuration: RWD, AWD
- Fuel
- Varies by configuration: Gasoline, Plug-in hybrid
- Economy
- 21 mpg (11.2 L/100 km) to 25 mpg (9.4 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 2.0L 4-cylinder turbocharged (SIDI), 3.0L 6-cylinder turbocharged (SIDI), 3.6L 6-cylinder (SIDI), 2.0L 4-cylinder turbocharged (SIDI; PHEV) | |
| Displacement | 2.0 L to 3.6 L | |
| Cylinders | 4 to 6 | |
| Aspiration | Turbocharged | |
| Fuel type | Varies by configuration: Gasoline, Plug-in hybrid | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 8 | |
| Drivetrain | Varies by configuration: RWD, AWD |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 21 mpg (11.2 L/100 km) to 25 mpg (9.4 L/100 km) | EPA fueleconomy.gov |
| City | 18 mpg (13.1 L/100 km) to 22 mpg (10.7 L/100 km) | |
| Highway | 26 mpg (9.0 L/100 km) to 30 mpg (7.8 L/100 km) |
Our sources do not publish these for this vehicle: Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
4 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked November 10, 2026.
18V673000: SEAT BELTS:REAR/OTHER
General Motors LLC (GM) is recalling certain 2018-2019 Cadillac CT6, Escalade ESV, Chevrolet Suburban, Volt, and GMC Yukon XL vehicles. Certain second-row or third-row rear seatbelts retractor assemblies may not automatically lock when the seatbelt is fully pulled out of the retractor, possibly preventing a child seat from being properly secured. As such, these vehicles fail to comply with the…
Remedy: GM will notify owners, and dealers will inspect the rear seatbelt retractors and replace them if necessary, free of charge. The recall began November 7, 2018. Owners may contact Cadillac customer service at 1-800-458-8006, Chevrolet…
Reported September 26, 2018. View on NHTSA
18V437000: SEATS:MID/REAR ASSEMBLY
General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles. The inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a child seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
Remedy: GM will notify owners, and dealers will inspect, remove any excess adhesive, and apply anti-corrosion primer to the inboard child seat anchorage bars, free of charge. The recall began August 3, 2018. Owners may contact Cadillac customer…
Reported June 28, 2018. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved November 5, 2026 · US Government public data
- NHTSA vPIC · retrieved October 12, 2026 · US Government public data
Source checked: November 5, 2026
Data verified: November 5, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Related vehicles
- 2017 Cadillac CT6
Varies by configuration: Gasoline, Plug-in hybrid
Varies by configuration: 3.6L 6-cylinder (SIDI), 3.0L 6-cylinder turbocharged (SIDI), 2.0L 4-cylinder turbocharged (SIDI), 2.0L 4-cylinder turbocharged (SIDI; PHEV) · Varies by configuration: AWD, RWD
25 mpg (9.4 L/100 km) to 21 mpg (11.2 L/100 km) - 2019 Cadillac CT6
Gasoline
Varies by configuration: 3.6L 6-cylinder (SIDI), 3.0L 6-cylinder turbocharged (SIDI), 2.0L 4-cylinder turbocharged (SIDI), 4.2L 8-cylinder turbocharged (SIDI) · Varies by configuration: AWD, RWD
28 mpg (8.4 L/100 km) to 17 mpg (13.8 L/100 km)
Explore similar vehicles
Frequently asked questions
What engine does the 2018 Cadillac CT6 have?
Varies by configuration: 2.0L 4-cylinder turbocharged (SIDI), 3.0L 6-cylinder turbocharged (SIDI), 3.6L 6-cylinder (SIDI), 2.0L 4-cylinder turbocharged (SIDI; PHEV). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2018 Cadillac CT6?
Combined fuel economy is 21 mpg (11.2 L/100 km) to 25 mpg (9.4 L/100 km), as published by the source shown in the specification table.
Is the 2018 Cadillac CT6 front-wheel, rear-wheel or all-wheel drive?
Drivetrain: Varies by configuration: RWD, AWD.
Are there recalls for the 2018 Cadillac CT6?
NHTSA lists 2 recall campaigns for this model year (last checked November 10, 2026). Details are in the Recalls section.