2020 Cadillac Ct6 problems, complaints & recalls
Most-reported problem areas: Power Train (5) · Service Brakes (2) · Wheels (1)
🧭 Reliability snapshot
Compared against other Cadillac Ct6 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (2)
Power Train:automatic Transmission 2025-03-06 · campaign 25V148000 · 90,081 vehicles
Defect: 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 2019-10-15 · campaign 19V731000 · 81 vehicles
Defect: 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 Monito
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.
Service bulletins (753)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-10-26 · GM Update N25-250552 · Over The Air
• improvements to onstar functionality.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Unknown Or Other 2026-03-09 · PIP6104 · Service Bulletin/Repair Instructions
this preliminary information communicates the steps on how to save a gds2 session log and upload to a technical assistance case in cx connect.
Showing the 6 most recent of 753 bulletins. Search all of them free at nhtsa.gov.
What owners report
2025-09-30 · Wheels“the vehicle was shifting harshly and my wheels were experiencing lock up while in motion which was very dangerous. i experienced this on the parkway as well as streets and almost had a few accidents due to this problem. i drive my wife and children in this vehicle. our safety and lives were put at risk. there were no warning lamps to advise of trou…”
2025-07-15 · Power Train · 98,000 mi“the contact owns a 2020 cadillac ct6. the contact stated while driving 65 mph, the transmission seized, and the vehicle was coasted over to the right side of the roadway while waiting for tow service. a dealer as contacted. the vehicle was towed to the dealer where it was diagnosed with transmission failure. the vehicle was not repaired. the manufa…”
2025-06-17 · Power Train“the contact owns a 2020 cadillac ct6. the contact received notification of nhtsa campaign number: 25v148000 (power train); however, the part to do the recall repair was unavailable. the contact stated that while his wife was driving at an undisclosed speed, the vehicle jerked before slamming into gear. no warning lights were illuminated. in additio…”
2025-06-10 · Power Train · 64,000 mi“the contact owns a 2020 cadillac ct6. the contact received notification of nhtsa campaign number: 25v148000 (power train); however, the part to do the recall repair was unavailable. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the contact stated that the transmission was shifting hard. the…”
2025-05-22 · Power Train“see attached document for complaint. …”
2025-04-11 · Power Train“the contact owns a 2020 cadillac ct6. the contact received notification of nhtsa campaign number: 25v148000 (power train); however, the part to do the recall repair was unavailable. the contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. the manufacturer was made aware of the issue. the contact had n…”
2025-02-24 · Structure:body“latelyi have had a problem with my back hatch door opening by it self the problem the last time it happen just before i enter a car wash now ive got a 7800 bill to repair it…”
2021-02-19 · Unknown Or Other · 8,900 mi“the super cruise self driving feature doesn't work and error messages continuously flash on dashboard. it has been at the dealer since 12/16 (>9 weeks) without any resolution. calls, emails, posts to cadillac and general motors go unanswered. dealer tells me cadillac engineers from corporate come and go with no solution. i've made 2 payments to d…”
2020-11-15 · Service Brakes · 15,300 mi · 💥 crash“on friday, november 13, 2020 i was stopped at a stoplight in marysville, ohio. it appeared that traffic started to move, so i took my foot off the brake. almost immediately the emergency braking feature engaged. while this tends to startle you because it is so abrupt, almost like a head-on collision, i pressed on the brake. the brake did not stop t…”
2020-11-12 · Suspension · 100 mi“tl* the contact owns a 2020 cadillac ct6. the contact stated that while depressing the brake pedal, there was a loud screeching sound coming from the wheels. the vehicle was taken to woodland cadillac located at 530 quality cir #101, woodland, ca 95776, to be diagnosed. the contact was informed that the front radial arms were faulty and needed to b…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.