2017 Cadillac Ct6 problems, complaints & recalls
Most-reported problem areas: Power Train (7) · Vehicle Speed Control (2) · Wheels (1)
🧭 Reliability snapshot
Compared against other Cadillac Ct6 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (1)
Exterior Lighting:headlights 2021-09-29 · campaign 21V759000 · 181 vehicles
Defect: 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."
Risk: The excessive brightness may affect the vision of other drivers, increasing the risk of a crash.
Fix: 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.
Service bulletins (665)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-21 · PIP5700H · Service Bulletin/Repair Instructions
this pi communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Unknown Or Other 2026-03-09 · PIP6104 · Service Bulletin/Repair Instructions
this preliminary information communicates the steps on how to save a gds2 session log and upload to a technical assistance case in cx connect.
Showing the 6 most recent of 665 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-05-20 · Wheels“unknown, the transmission slips,it wont drive now and my wheel barrings nearly snapped …”
2026-01-29 · Vehicle Speed Control“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 attempts, including transmission-related work, have not resolved the issue. the vehicle has surged forward unexpectedly, creating nea…”
2025-11-21 · Fuel/Propulsion System“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 transmission issue when purchased new and the dealer stated same findings.then recall was issued and transmission was repaired for a k…”
2025-04-18 · Vehicle Speed Control“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 lines . my vehicle is a 2017 cadillac ct6 with 72027 miles . i’ve been to 4 cadillac certified dealers and none can locate to problem …”
2025-03-20 · Structure:body“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…”
2024-11-21 · Power Train“these vehicles have an issue tbat gm is aware of, with their 8 speed automatic transmissions which are used in multiple gm vehicles and these cause safety issues because for instance my vehicle switches gears randomly almost causing a wreck, and shuttering, and even slipping and when this happens the cars traction control light is engaged shutting …”
2024-06-22 · Service Brakes“transmission - jerks and studders (hesitation) in the course of normal driving. brakes - makes a squealing noise which has gotten louder over time.…”
2023-07-16 · Power Train“the car is equipped with an 8-speed automatic transmission which is frequently very hard shifting from 1st to 2nd gear. the car has been to my local cadillac dealer twice for this problem; they reply this is a know problem, and a normal condition, but the problem is getting worse. i'm concerned for the future and afraid of an accident because of …”
2023-07-06 · Tires“sidewall cracking issue with all for tires - pirelli p zero nero 245/40/r20 while traveling out of town (dallas to san antonio) we experienced some tire issues which led to us needing to replace all 4 tires. several weeks prior, we began to noticed a very slight loss of tire pressure and had the tires checked twice for any objects or other dama…”
2022-10-10 · Power Train“while driving the vehicle with auto stop engaged, the auto stop was malfunctioning. when i get to a red light or stop sign vehicle would engage auto stop, once i let my feet off the gas pedal and accelerate, the vehicle would jerk out of gear then slip /drag then engage with a loud hit as if someone rear-ended me. the problem was duplicated and co…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.