2020 Cadillac CT6: what breaks, and when
A free preview from Milo. A history report shows one car's past — Milo shows the whole model: which one to buy, what breaks, and what to knock off the price.
6/10
A brilliant, criminally underrated flagship that GM killed too soon — but the 10-speed transmission recall is a legitimate landmine you must resolve before buying.
🏛️ 2 recalls · 11 owner complaints · 0 investigations · 0 service bulletins (NHTSA)
🎯 Negotiation ammo — walk in knowing this
Free. The seller won’t volunteer any of it.
- ✅ Verify this recall: 10-speed automatic transmission (Hydra-Matic 10L90) internal failure/seizure — subject of NHTSA recall 25V148000. Make the seller prove it’s been done — an open recall is money off the price.
- 💸 Budget for this: Rear liftgate/trunk latch actuator failing or self-opening, sometimes triggering water-damage repairs — $300–$7,800 if it goes. Check it on the test drive; if it’s near due, negotiate it down.
- 🧾 Your opening line: “2020 Cadillac CT6s have known issues around this mileage — here’s my number.” Milo’s full report hands you the market price and a line-by-line offer script.
Known failures, by mileage — what breaks and when
See every documented 2020 Cadillac CT6 problem →
Ordered by mileage. Severity and Milo's confidence in each finding are shown; VERY HIGH means it's tied to a documented NHTSA recall.
20k–60k mi
10-speed automatic transmission (Hydra-Matic 10L90) internal failure/seizure — subject of NHTSA recall 25V148000
● Critical$0–$6,500VERY HIGHdocumented (NHTSA recall)
30k–70k mi
Twin-turbo 3.0L (LGW) carbon buildup on intake valves from direct injection
● Watch$500–$900MODERATEmulti-source pattern (AI synthesis)
40k–80k mi
Rear liftgate/trunk latch actuator failing or self-opening, sometimes triggering water-damage repairs
● Plan$300–$7,800MODERATEmulti-source pattern (AI synthesis)
50k–90k mi
Super Cruise camera/LIDAR map module and radar calibration faults causing feature disablement
● Watch$0–$1,200MODERATEmulti-source pattern (AI synthesis)
60k–100k mi
Air suspension compressor and leveling sensor wear (on Platinum/Sport trims with Magnetic Ride/adjustable air suspension)
● Plan$1,200–$2,500MODERATEmulti-source pattern (AI synthesis)
70k–110k mi
Brake booster/electronic parking brake and forward collision warning false-positive emergency braking events
● Watch$200–$1,500MODERATEmulti-source pattern (AI synthesis)
Which one to get — and which to avoid
✅ The one to get
2020 CT6 Premium Luxury or Platinum trim with the 3.0L twin-turbo AWD (LGW), Active Rear Steer, and confirmed-completed 10-speed transmission recall — this is the sweet spot of performance, tech, and value.
🚫 Avoid
Any CT6 with an open/unresolved 10-speed transmission recall, or a base 3.6L RWD example if you actually want the driving experience this car is capable of.
Get the full Milo report on this Cadillac CT6
This preview is the tip of it. The full report digs into your exact car:
- A line-by-line negotiation script
- Exact repair costs & parts prices
- The pre-purchase inspection checklist
- VIN-specific open recalls
- What it's really worth (market pricing)
- Hidden features & money-savers
See Milo's full 2020 Cadillac CT6 report →
Full report · $10 · about 2 minutes
Milo's findings blend documented NHTSA recalls & complaints with patterns synthesized from owner communities. Confidence is labeled on every item; an inference is never presented as a documented fact. Always inspect the specific vehicle and verify open recalls by VIN before buying.