DecodedCars2020 Cadillac CT6
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2020 models.
- Class
- Large Cars
- Body styles
- Luxury AWD 4dr Sedan, Platinum AWD 4dr Sedan, Premium Luxury AWD 4dr Sedan, V-Series AWD 4dr Sedan
- Engines
- 3.6L 6-cyl, 4.2L 8-cyl turbo
- Drivetrain
- All-Wheel Drive
- Fuel
- Regular Gasoline, Premium Gasoline
- MPG (best)
- 21 combined · 18 city / 27 hwy
- Length
- 205.9 in
- Curb weight
- 3,986–4,489 lb
- NHTSA rating
- Not rated
- Recalls
- 2 campaigns
Overview
The 2020 Cadillac CT6 is a large car offered with 2 engines (3.6L 6-cyl and 4.2L 8-cyl turbo) and all-wheel drive.
It measures about 206 inches long and 74 inches wide on a 122-inch wheelbase, with a curb weight of roughly 3,986 lb (Luxury AWD 4dr Sedan).
EPA rates its most efficient version at 21 MPG combined (18 city / 27 highway), 10% worse than the 2020 large car average of 23.3 MPG, for an estimated $3,200 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
It has 2 recall campaigns on file and owners have filed 11 complaints with NHTSA since 2015, most often about the power train.
What changed for 2020
- Engines dropped: 2.0L 4-cyl turbo and 3.0L 6-cyl turbo
- Best combined MPG down from 28 to 21
Compared with 2019; trim, feature and price changes aren't covered. See the 2019 CT6 →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| Luxury AWD 4dr Sedan | 205.9 in | 74 in | 57.9 in | 122.4 in | 63.4 / 64.2 in | 3,986 lb | 50/50 |
| Platinum AWD 4dr Sedan | 205.9 in | 74 in | 57.9 in | 122.4 in | 63.4 / 64.2 in | 4,217 lb | 50/50 |
| Premium Luxury AWD 4dr Sedan | 205.9 in | 74 in | 57.9 in | 122.4 in | 63.4 / 64.2 in | 4,129 lb | 50/50 |
| V-Series AWD 4dr Sedan | 205.9 in | 74 in | 57.9 in | 122.4 in | 63.4 / 64.2 in | 4,489 lb | 50/50 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| CT6 AWD | 3.6L 6-cyl | Automatic (S10) | All-Wheel Drive | 18 / 27 / 21 | -10% | $3,200 | 420 |
| CT6 AWD | 4.2L 8-cyl turbo | Automatic (S10) | All-Wheel Drive | 14 / 25 / 17 | -27% | $4,850 | 521 |
EPA estimates; "vs. class" is combined MPG against the 2020 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2020 Cadillac CT6.
Similar 2020 large cars
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2020 Cadillac CT6 (this car) | 21 MPG | Not rated | 2 |
| 2020 BMW 7 Series | 24 MPG | Not rated | 0 |
| 2020 Lexus LS | 28 MPG | Not rated | 2 |
| 2020 Lincoln Continental | 21 MPG | ★★★★★ | 2 |
| 2020 Porsche Panamera | 23 MPG | Not rated | 2 |
| 2020 Lexus ES | 44 MPG | Not rated | 3 |
| 2020 Audi A8 | 23 MPG | Not rated | 5 |
Recalls (2)
Power Train › Automatic Transmission · Mar 6, 2025
NHTSA campaign 25V148000 · 90,081 vehicles
- Problem
- General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally and cause the wheels to lock-up.
- Risk
- Wheel lock-up while driving increases the risk of a crash.
- Fix
- Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242480630.
Tires › Pressure Monitoring And Regulating Systems · Oct 15, 2019
NHTSA campaign 19V731000 · 81 vehicles
- Problem
- General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" wheels (RPO 5JO or SHH). The tire pressure monitoring system (TPMS) sensors use the incorrect wireless radio frequency and cannot illuminate the low pressure warning light when the tire pressure drops below the recommended level. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring Systems."
- Risk
- Drivers may drive the vehicle with low tire pressure without a low tire pressure warning, negatively impacting the vehicle handling and increasing the risk of a crash.
- Fix
- GM will notify owners, and dealers will replace all four TPMS sensors with the correct sensors, free of charge. The recall began December 3, 2019. Owners may contact GM customer service at 1-586-596-1733. GM's number for this recall is N192279200.
Not every 2020 Cadillac CT6 is affected — only a VIN check confirms your car.
Owner-reported problems
Unverified owner reports; best-sellers collect more.
Used 2020 Cadillac CT6 buyer's checklist
- Run the VIN at nhtsa.gov/recalls. 2 recalls this year — ask for proof of repairs.
- Power Train — 6 owner reports. Test-drive through all gears, including reverse; note slipping, harsh or delayed shifts.
- Service Brakes — 3 owner reports. Brake firmly from speed; check for pulling, pulsing pedal or ABS warning light.
- Suspension — 1 owner reports. Drive over bumps and listen for clunks; look for uneven tire wear.
- Mileage to watch. Owners typically reported problems around 15,300 miles; ask what was repaired near that point.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2020 Cadillac CT6. Not a substitute for a professional inspection.
Other CT6 years
Compare all years →Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Cadillac. How we calculate this →