2017 Cadillac CT6: Recalls, Problems & MPG
Here are the deets on the 2017 Cadillac CT6: 1 recall, 17 owner complaints and up to 25 mpg combined.

Recalls
1 vehicle recall from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Exterior lights, Exterior lights Vehicle recall #21V759000 · 2021 · 181 vehicles
What's wrong: The park/position lights May be excessively bright. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "lamps, reflective devices, and associated equipment."
Why it matters: The excessive brightness May affect the vision of other drivers, increasing the risk of a crash.
The fix: Dealers will install right and left side in-line headlight jumper harnesses, free of charge. Owner notification letters were mailed November 3, 2021.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 0 mention a fire, 0 injuries and 0 deaths were reported.
What owners describe
- Transmission & drivetrain (10): the most common themes are hard / delayed shifting (10), noise or vibration (2).
- Electrical (4): no single recurring theme in the descriptions.
- Brakes (2): no single recurring theme in the descriptions.
- Speed control / throttle (2): no single recurring theme in the descriptions.
The 2017 Cadillac CT6 has 17 owner complaints, ranking #1 of 5 CT6 model years for complaints (about average; the typical year has 13). Complaints peaked in 2021 (3 filed that year). The typical problem showed up when the car was about 5 years old, at a median of 10,000 miles. Neighboring years: 2016 (11 complaints, 3 recalls), 2018 (9 complaints, 0 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 2.0 L 4-cyl turbo | Automatic (S8) | Rear-Wheel Drive | 22 | 30 | 25 | Premium |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2017 Cadillac CT6.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
Books ~$30–$40 · AllAccess $34.99/moHeads up: we may earn a commission if you buy through these links, at no extra cost to you. Prices checked 2026-10 and can change. We never host or link to pirated manuals. Disclosure
FAQ
Does the 2017 Cadillac CT6 have any recalls?
Yes. NHTSA lists 1 vehicle recall for the 2017 Cadillac CT6. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2017 Cadillac CT6 problems?
Owners have filed 17 complaints with NHTSA. The most-reported areas are transmission & drivetrain (10), electrical (4), brakes (2).
What gas mileage does the 2017 Cadillac CT6 get?
EPA ratings run up to 25 mpg combined (2.0 L, Automatic (S8)), across 1 engine and transmission combos.
Where can I get a 2017 Cadillac CT6 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.