Reliable Auto DB

2017 Cadillac CT6 reliability

Is it reliable?

The 2017 Cadillac CT6 has 26 complaints with NHTSA after 10 years, or 3 per year. That is the most complaints per year among the 5 CT6 years on this site. NHTSA has 2 recalls on file, including Exterior lighting and Middle or rear assembly.

2016 Cadillac CT6
Photo by Greg Gjerdingen from Willmar, USA, resized from the original. Wikimedia Commons CC BY 2.0
Complaints

26

Per year

3

Recalls

2

Years on the road

10

What owners report

The complaints owners file most often name Powertrain (17 of 26), then Electrical system (5) and Engine (2).

Next to 2016 and 2018

The 2016 CT6 has 11 complaints, 1 per year, and the 2018 has 12 complaints, 1 per year. The 2017 has more complaints per year than the 2016. The 2017 has more complaints per year than the 2018.

The complaint rate is complaints filed in this year’s first 3 years on the road, divided by however many of those years have passed. Recalls are a separate count. The numbers are for the US-market 2017 Cadillac CT6. How we count. Data as of .

Recalls (2)

Recall Exterior lighting 2021-09-29 · NHTSA campaign 21V759000
Summary General Motors, LLC (GM) is recalling certain 2016-2017 Cadillac CT6 vehicles. 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."
Remedy Dealers will install right and left side in-line headlight jumper harnesses, free of charge. Owner notification letters were mailed November 3, 2021. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is N162016079.
Recall seats, middle or rear assembly 2018-06-28 · NHTSA campaign 18V437000
Summary General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles. The inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a child seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."
Remedy GM will notify owners, and dealers will inspect, remove any excess adhesive, and apply anti-corrosion primer to the inboard child seat anchorage bars, free of charge. The recall began August 3, 2018. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 18228.

Complaints by component (26 total)

Powertrain
17
Electrical system
5
Engine
2
Service brakes
2
Speed control
2
Structure
2
Forward collision avoidance
1
Fuel and propulsion system
1
Steering
1
Suspension
1
Tires
1
Visibility
1
Visibility and wipers
1
Wheels
1
Show 6 more Show less
Crash-flagged

0

Fire-flagged

0

Injury reports

0

Death reports

0

Complaints filed per year

22017320183201932020320213202222023220243202522026
Excerpts from recent NHTSA complaint filings
  • "UNKNOWN, The transmission slips,it wont drive now and my wheel barrings nearly snapped"
    Suspension, Powertrain, Wheels · filed 2026-05-20
  • "The vehicle experiences harsh shifting, surging, and jerking forward during normal driving conditions. The behavior has occurred repeatedly over several years and has been confirmed by the dealership. Multiple repair…"
    Powertrain, Speed control · filed 2026-01-29
  • "My CT6 had a default engine light on,.Dealer reports broken EVAP line.Car has never been in an accident or damaged.Upon inquiry dealer reports no issues known to them with this problem.However ,this same vehicle had…"
    Fuel and propulsion system · filed 2025-11-21
  • "My vehicles transmission has a buzzing noise coming from the transmission oil pan and a gear shifting problem I took vehicle to Cadillac dealer whom can’t find the issue they changed the oil pan and the transmission…"
    Speed control · filed 2025-04-18
  • "Water is getting into my trunk where the amp is and now my radio does not work only the back up camera. I cannot control the AC or turn on the air conditioner. Or is that how I would like it to blow"
    Electrical system, Structure · filed 2025-03-20

NHTSA crash ratings

Version Overall Front Side Rollover
2017 Cadillac CT6 4DR AWD Not rated Not rated Not rated Not rated
2017 Cadillac CT6 4DR RWD Not rated Not rated Not rated Not rated
2017 Cadillac CT6 Hybrid 4DR AWD Not rated Not rated Not rated Not rated

Stars are how this vehicle did in NHTSA crash tests. They are a safety result, separate from the complaint record. Not rated means that test was not run for this version.

Fuel economy

Trim Engine Transmission Drive City Hwy Combined Annual fuel cost
CT6 2L, 4-cyl Automatic (8-speed) Rear-wheel drive 22 30 25 MPG $3200
CT6 all-wheel drive 3.6L, 6-cyl Automatic (8-speed) All-wheel drive 18 27 21 MPG $3100
CT6 all-wheel drive 3L, 6-cyl Automatic (8-speed) All-wheel drive 18 26 21 MPG $3800
CT6 Plug-In 2L, 4-cyl Automatic (variable gear ratios) Rear-wheel drive 23 29 26 MPG / 440 mi range $3050

Specs and fitment

First generation, 2016–2020
Body styles Sedan
Oil 5W-30 (all temps); 0W-30 below -29°C (2.0L turbo example) , 5 qt capacity
Tire size 235/50R18, 245/45R19, 245/40R20 (trim-dependent) front / 235/50R18, 245/45R19, 245/40R20, 265/45R18 (trim-dependent) rear

Known issues for this generation

Recall 18V-437 covers certain 2016-2018 Cadillac CT6 vehicles: excess structural adhesive on the inboard child-seat anchorage bars may prevent a child restraint from attaching properly, which can increase injury risk in a crash. Dealers remove excess adhesive and inspect the anchorage bars. Recall 21V-759 covers certain 2016-2017 CT6 vehicles: the park/position lights may be excessively bright, so the vehicles fail to comply with federal lighting standards; dealers replace the affected lamp assemblies or reprogram as specified in the campaign.

Compare

Previous year 2016 Cadillac CT6 Next year 2018 Cadillac CT6 See every Cadillac CT6 model year →

Frequently asked questions

Is the 2017 Cadillac CT6 reliable?

The 2017 Cadillac CT6 has 26 complaints with NHTSA after 10 years, or 3 per year. That is the most complaints per year among the 5 CT6 years on this site. NHTSA has 2 recalls on file, including Exterior lighting and Middle or rear assembly.

What are common problems with a 2017 Cadillac CT6?

The complaints owners file most often name Powertrain (17 of 26), then Electrical system (5) and Engine (2).

Is the 2017 Cadillac CT6 more reliable than the years next to it?

The 2016 CT6 has 11 complaints, 1 per year, and the 2018 has 12 complaints, 1 per year. The 2017 has more complaints per year than the 2016. The 2017 has more complaints per year than the 2018.

Has the 2017 Cadillac CT6 been recalled?

The 2017 Cadillac CT6 has 2 recalls on file with NHTSA. See the recalls table on this page for dates, components, and remedies.

How many complaints have owners filed about the 2017 Cadillac CT6?

Owners have filed 26 complaints about the 2017 Cadillac CT6 with NHTSA.

What mpg does a 2017 Cadillac CT6 get?

EPA-rated combined fuel economy for the 2017 Cadillac CT6 is 23.3 MPG. See the fuel economy table on this page for city and highway figures by engine and transmission.

What oil does a Cadillac CT6 use?

Common specs cite 5W-30 (0W-30 below −29 °C on some turbo engines) with about 5 qt including filter; confirm for your engine code.

What tire sizes fit the Cadillac CT6?

OE sizes include 235/50R18, 245/45R19, and 245/40R20 with some trims using a wider rear; check the door placard.

What recalls affect the Cadillac CT6?

Recall 18V-437 covers certain 2016-2018 CT6 models for excess adhesive on inboard child-seat anchor bars; 21V-759 covers certain 2016-2017 CT6 vehicles for overly bright park/position lamps.