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What 10 owners told NHTSA about the 2018 Cadillac CT6 Hybrid

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (10)Engine (4)Steering (3)Transmission & drivetrain (3)Body & structure (1)Brakes (1)Driver assistance (1)Electrical system (1)Electronic Stability Control (esc) (1)Fuel system (1)Lane Departure (1)

1 of 10 complaints match · Brakes · clear filters

Feb 21, 2023BrakesEngine

The brake makes a rattling and metal grinding sound, the dealership said nothing is wrong with the brakes, still problematic. The transmission shifts too hard. Dealer said nothing wrong. Yet cat kicks too hard.

NHTSA ODI 11508253

Working with the data? Download all 10 complaints as CSV · fetched from NHTSA July 25, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Cadillac CT6 Hybrid verdict →