This page covers 1 recall, 16 owner complaints and EPA fuel economy for the 2017 Cadillac CT6.
21–25 mpg combined
9.4–11.2 L/100km
Large Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 3 tested variants for this model year.
Transmission behavior is the dominant pattern in 2017 CT6 owner complaints. Owners frequently describe harsh or erratic shifting, shuddering, surging, and unexpected forward jolts during normal driving. Several owners report the transmission making a buzzing or humming noise, and at least one traces it to the transmission pan area even after the pan and fluid lines were replaced. A recurring frustration is that dealership visits, sometimes four or more, fail to produce a lasting fix. A smaller number of owners report speed control concerns, including the vehicle switching gears unexpectedly in ways that owners say activated the traction control warning and disabled active steering. Brake squealing appears in at least one report but does not rise to a clear multi-complaint pattern at this complaint volume.
16
Total Complaints
By System
At a glance
What can fail
The parking lights on these vehicles glow brighter than allowed by federal safety standards, failing to meet lamp brightness requirements.
What the fix does
Dealers will install new headlight jumper harnesses on both sides of the vehicle at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
