2020 Cadillac CT6 Reliability Data: Problems & Recalls
Avoid The 2020 Cadillac CT6 ranks 2nd-worst of 5 model years with a complaint index of 75 and an Avoid verdict. NHTSA lists 11 complaints, 2 recalls, and 1 crash, with Transmission & Powertrain the top problem area at 55% of complaints.
Based on NHTSA complaints per model-year, not a reliability rating. Methodology
YearToAvoid Scorecard
- Complaint Index
- 75/100
- #2 of 5 CT6 years
- Verdict
- Avoid
- vs. other years of this model
- Complaints
- 11
- unique NHTSA reports
- Recalls
- 2
- distinct NHTSA campaigns
- Crashes
- 1
- reported in complaints
- Fires
- 0
- Injuries
- 0
- Top issue
- Transmission & Powertrain
- NHTSA overall rating
- Not rated
- EPA combined MPG
- 19
- 16 city / 26 hwy
- Injuries / deaths
- 0 / 0
Top 2020 Cadillac CT6 problems
Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.
- Transmission & Powertrain6 (55%)
- Brakes3 (27%)
- Collision Avoidance & Cameras2 (18%)
- Suspension, Wheels & Tires2 (18%)
- Other1 (9%)
- Structure & Body1 (9%)
A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.
What owners report
- Owners report the transmission jerking or slamming into gear without warning lights, sometimes at highway speed.
- Some describe the transmission seizing entirely while driving 65 MPH, requiring a tow.
- Front brakes produce a loud scraping or screeching noise, in one case traced to faulty front radial arms.
- One driver reported the automatic emergency braking system engaged abruptly at a stoplight and failed to stop the car, resulting in a crash.
- Wheels reportedly locked up during driving while the vehicle also shifted harshly, described as dangerous by the owner.
- Multiple owners with the 10-speed transmission recall said replacement parts were unavailable for an extended time.
2020 Cadillac CT6 recalls
2 NHTSA recall campaigns list this model year.
- NHTSA 25V148000Mar 6, 2025Transmission & Powertrain90,081 vehicles
Power train:automatic transmission
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.
Remedy: 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.
- NHTSA 19V731000Oct 15, 2019Suspension, Wheels & Tires81 vehicles
Tires:pressure monitoring and regulating systems
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.
Remedy: 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.
2020 Cadillac CT6 fuel economy and fuel cost
- City
- 16 MPG
- Highway
- 26 MPG
- Combined
- 19 MPG
- Annual fuel cost (EPA)
- $3,900
- 15,000 mi/yr
- Fuel
- Regular
- Current regular gas
- $4.32/gal
- national avg.
EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.
2020 compared with other CT6 years
Frequently asked questions
- Is the 2020 Cadillac CT6 reliable?
- Among the 5 model years with data, 2020 ranks 2nd-worst with a complaint index of 75 and carries an Avoid verdict. NHTSA logged 11 complaints and 2 recalls for this year.
- What problems does the 2020 Cadillac CT6 have?
- Transmission & Powertrain issues make up 55% of complaints, including hard shifting and reported transmission seizure. Brakes account for 27% of complaints, including screeching noise and a case where automatic emergency braking allegedly failed to stop the car.
- Does the 2020 Cadillac CT6 have a transmission recall?
- Yes. Recall 25V148000 covers the 10-speed transmission, which General Motors says may become internally damaged; the remedy is a transmission control module software update. Some owners reported the repair parts were unavailable for a long time.
- How does the 2020 CT6 compare to other years?
- 2020 is worse than 2017 (Good, index 25), 2018 (Best, index 0), and 2019 (Caution, index 50), but slightly better than 2016 (Avoid, index 100).
- What is the fuel economy of the 2020 Cadillac CT6?
- EPA rates it at 19 mpg combined (16 city / 26 highway), with an estimated annual fuel cost of $3,900.