Model year

2018 Cadillac CT6 Plug-In Hybrid

Sedan, plug-in hybrid, built in China. Owner complaints on file from May 30, 2018 to Oct 16, 2020.

Recall campaigns covering this model year238k vehicles or units across those campaigns
Owner complaints3Below the median 2018 sedan
Severity index0.02018 sedans average 6.6
First 24 months1Complaints in its first two years
Complaints over time

Complaints about the 2018 Cadillac CT6 Plug-In Hybrid peaked in 2020, with 2 filed

Owner complaints about this model year, by the year they were filed with NHTSA.

00.511.522018201920202202120222023202420252026
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

33% of complaints about the 2018 Cadillac CT6 Plug-In Hybrid name electrical system

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

Electrical system
1
Stability and traction control
1
Engine and cooling
1
Powertrain
1
Steering
1
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

2 recall campaigns cover the 2018 Cadillac CT6 Plug-In Hybrid

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2018 Cadillac CT6 Plug-In Hybrid
CampaignFiledSubjectComponentVehiclesRemedy
18V-673Sep 26, 2018Certain second-row or third-row rear seatbelts retractor assemblies may not automatically lock when the seatbelt is fully pulled out of the…Seat belts15,800Part replacement
18V-437Jun 28, 2018Inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a…Child seats22,043Repair or modification
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2018 Cadillac CT6 Plug-In Hybrid

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

3 complaints on file, page 1 of 1.

  1. Filed Oct 16, 2020Failure Oct 15, 202027,000 milesHouston, TXElectronic stability control (esc), Engine, Steering

    MY ENGINE LIGHT IS ON AND THIS IS THE 15TH TIME I HAVE BOUGHT MY CAR IN FOR VARIOUS ENGINE PROBLEMS LIKE ENGINE POWER REDUCED AND OTHER PROBLEMS WITH THIS CAR. THE CAR WOULD JUST STOP IN THE MIDDLE OF THE RIDE OR JERKING AS I DRIVE IT. I HAVE BEEN ON THE HIGHWAY WHEN IT HAS STALLED BEFORE AS I DRIVE. I HAVE HAD THESE PROBLEMS SINCE I PURCHASED THE CAR IN 2018

    NHTSA complaint 11364614
  2. Filed Jul 24, 2020Failure Jul 23, 202030,500 milesWest Covina, CAPower train

    LOSS OF ALL VEHICLE POWER WHILE TRAVELING ON THE FREEWAY AT HIGHWAY SPEEDS. VEHICLE CHECK ENGINE, POWER LIMITED, AND ELECTRIC MOTOR OVERHEAT WARNING LIGHTS COME ON. THE COMBUSTION ENGINE WILL NOT START, AND BATTERY POWER AVAILABILITY GOES TO ZERO. THIS IS VERY DANGEROUS TO PUBLIC HEALTH AND SAFETY DUE TO INSTANTANEOUS LOSS OF COMBUSTION ENGINE AND ELECTRIC BATTERY POWER WHILE IN FAST-MOVING HIGHWAY TRAFFIC. THERE ARE SEVERAL INSTANCES OF THIS SAME PROBLEM OCCURRING IN MANY CADILLAC OWNERS FORUMS, SO GENERAL MOTORS KNOWS THERE IS A PROBLEM WITH THEIR CT6 PHEV TRANSMISSIONS. THE FIX SEEMS TO BE REPLACING THE TRANSMISSION DUE TO A BAD CLUTCH PACK, BUT PEOPLE COULD GET HURT IF THIS ISSUE IS ALLOWED TO CONTINUE WITHOUT A PERMANENT SOLUTION.

    NHTSA complaint 11341298
  3. Filed May 30, 2018Failure Jan 31, 2018250 milesFrederick, MDElectrical system

    RIGHT AFTER PURCHASE, THE NAV SCREEN KEPT FLICKERING, CAUSING A DISTRACTED DRIVER SITUATION AND A HAZARD. THE DEALER DID EVERYTHING THEY COULD PER GM GUIDELINES, BUT EVEN AFTER THE 1ST SERVICE VISIT, THE CAR WOULD SHUT DOWN IN DRIVE MODE, AS THE VEHICLE WAS IN MOTION. THEN THE VEHICLE WOULD NOT SHUT OFF USING THE POWER OFF BUTTON. GM IS TELLING THE DEALER, THE NAV FLICKERING SCREEN IS NOT A SAFETY HAZARD, HOWEVER I BEG TO DIFFER IF EVERY 2 MINS, A DRIVER IS FIXATED, FOCUSED ON THE SCREEN MORE SO THAN ON THE ROAD, WHICH HAS CAUSED ME TO RUN OFF THE ROAD A FEW TIMES. THIS IS A SERIOUS SAFETY HAZARD AND ELECTRICAL CONCERN THAT GM DOES NOT SEEM TO CARE ABOUT EVEN AFTER 60+ DAYS AT THE DEALERSHIP.

    NHTSA complaint 11098735
Source: NHTSA ODI complaints file.
Investigations

NHTSA has not opened an investigation on this model year

Source: NHTSA ODI investigations file.
Service bulletins

413 manufacturer communications cover this model year

Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.

  • PIT5698F Sep 26, 2026 · Service Bulletin/Repair Instructions
    This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
  • PIP4902W Sep 4, 2026 · Service Bulletin/Repair Instructions
    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • PIT5099J Jul 21, 2026 · Service Bulletin/Repair Instructions
    PI to help diagnose A/C concern
  • PIT3271Q Apr 1, 2026 · Service Bulletin/Repair Instructions
    This preliminary information communicates information about how to determine if a wheel and tires size change is available.
  • PIP6104 Mar 9, 2026 · 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.
  • PIP4902V Mar 9, 2026 · Service Bulletin/Repair Instructions
    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • PIP4902U Jan 8, 2026 · Service Bulletin/Repair Instructions
    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • 25-NA-156 Jun 7, 2025 · Service Bulletin/Repair Instructions
    This service bulletin provides information on Tire Sidewall Irregularities.
  • 00-06-01-026R Jun 5, 2025 · Service Bulletin/Repair Instructions
    This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
  • PIT5214G Nov 20, 2025 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions without utilizing the support of Genera…
  • 18-NA-180 Sep 4, 2025 · Service Bulletin/Repair Instructions
    This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
  • 18-NA-180 May 14, 2025 · Service Bulletin/Repair Instructions
    This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information.
  • 13598 Sep 9, 2025 · Other
    New Vehicle Monitoring Programs Section in IVH
  • PIP4902T Aug 14, 2025 · Service Bulletin/Repair Instructions
    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • PIC5650M Aug 7, 2025 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B306…
  • PIE0540 Sep 17, 2019 · Service Bulletin/Repair Instructions
    This engineering informational bulletin is requesting to gather information from the field to determine a root cause for a condition of oil leaking from the valve rocker arm oil control valve. The information gathered will be used to develop a field fix.
  • 17NA073 Sep 18, 2019 · Service Bulletin/Repair Instructions
    This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
  • PIP4670H Sep 25, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about a no start or another concern after swapping an Engine Control Module or other modules from one vehicle to another. The Global Architecture electrical system associated …
  • PIP5676A Sep 23, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates to the technician information on what may be setting DTC P06DE. This is in addition to what is already in the service manual.
  • PIC6048K Sep 18, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communicates to the technician that some customers may comment on the operation of their haptic seat during a Lane Keep Assist event. Lane Keep Assist works differently than Lane Departure Warning. The Lane Keep Assist icon is s…
  • PIP5676 Sep 16, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates to the technician information on what may be setting DTC P06DE. This is in addition to what is already in the service manual.
  • PIP5632B Sep 6, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session log…
  • PIT3099S Sep 5, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits.  Technicians should refer to Service Information for information regarding most accessories.  Technicians may also contac…
  • PIT5551E Sep 5, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates a "Forward Collision System Reduced" message displayed on the DIC when the Forward Automatic Braking has been set to the "Alert" setting.  This is normal when the FAB has been set to  "Alert".
  • N192217820 Aug 1, 2019 · Service Bulletin/Repair Instructions
    N192217820 - Service Update Bulletin. The current transmission fluid may cause the customer to experience a shake or shudder feeling, which may be described as driving over rumble strips or rough pavement. Dealers are to drain the old transmission fluid a…
  • PIE0529 Aug 6, 2019 · Service Bulletin/Repair Instructions
    This engineering information bulletin is requesting information from the field to validate a field fix. Before contacting engineers, remove the transmission oil pan and inspect for nickel to quarter size pieces of aluminum debris in the oil pan. The 2-3-4-6…
  • PI0592E Aug 23, 2019 · Service Bulletin/Repair Instructions
    This preliminary information bulletin provides information om Service Programming System (SPS) Error Codes E4398, E4399, E4403, M4404, M4413, E4414, E4423, E4491 or E6961).
  • 130089008B Aug 19, 2019 · Service Bulletin/Repair Instructions
    This bulleting provides Wiring, Terminal and Connector Repair Information including how to determine the Service Part Number in eSI and how to locate the part(s) in the EPC.
  • 090604026R Aug 21, 2019 · Service Bulletin/Repair Instructions
    This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
  • 080730026F Aug 12, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen …
  • 070601016F Aug 13, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter Replacement.
  • 000601026M Aug 15, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
  • 18NA146 Aug 23, 2019 · Service Bulletin/Repair Instructions
    This warranty administration bulletin provides policy information, proper labor operation selection and causal part identification for warranty transactions (U.S. Only).
  • 16NA109 Aug 5, 2019 · Service Bulletin/Repair Instructions
    This technical bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of the steering gear due to seeing grease or sealant on certain locations on the gear.
  • PIC6123E Aug 20, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician for the adaptive cruise control or lane keep assist unavailable message in the driver?s information center after the vehicle has been parked in direct sunlight and high ambien…
  • PIC6123D Aug 7, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician for the adaptive cruise control or lane keep assist unavailable message in the driver?s information center after the vehicle has been parked in direct sunlight and high ambien…
  • 19NA142 Jul 25, 2019 · Service Bulletin/Repair Instructions
    This technical bulletin provides information for new transmission oil to use, a procedure for exchanging the old fluid and adding the new fluid to a service transmission.
  • 19NA010 Jul 30, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information for dealers/technicians on Information on Head-Up Display (HUD) on Vehicles Model Year 2017 and Newer Has Rotational Feature that Allows for Adjusting of the Angle of the HUD Image.
  • N192211740 01 Jun 21, 2019 · Service Bulletin/Repair Instructions
    Customer Satisfaction Program (revised service procedure). General Motors is expanding the mileage of Super Cruise enabled roads to include over 70,000 additional miles (112,000 additional km) by the end of 2019, bringing the total number of Super Cruise en…
  • 192217490 Jun 14, 2019 · Service Bulletin/Repair Instructions
    Customer Satisfaction Program. General Motors is expanding the mileage of Super Cruise enabled roads to include over 70,000 additional miles (112,000 additional km) by the end of 2019, bringing the total number of Super Cruise enabled roads to over 200,000 …
  • 990089019R Jul 26, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides process information for the (GWM) and (WPC) parts return program.
  • 18NA355 Jul 29, 2019 · Service Bulletin/Repair Instructions
    This technical bulletin provides information for new transmission oil to use and a procedure for exchanging the old fluid and adding the new fluid to correct a shake/shudder during light throttle acceleration condition.
  • N192211740 02 Jul 31, 2019 · Service Bulletin/Repair Instructions
    Customer Satisfaction Program (revised service procedure and warranty information). General Motors is expanding the mileage of Super Cruise enabled roads to include over 70,000 additional miles (112,000 additional km) by the end of 2019, bringing the total …
  • PIT5698 Jul 30, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.
  • PIC6208D Jul 29, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates that when a customer or technician attempts to add a new transmitter to a vehicle following the adding transmitters without Service Programming System procedure the procedure will not complete and a message "Remote …
  • PIC6355A Jul 23, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about how to diagnosis a battery draw that may be caused by a module back feeding voltage in the ignition relay circuits making the vehicle think it is still awake.
  • PIT5569A Jul 16, 2019 · Service Bulletin/Repair Instructions
    This Preliminary information communicates direction and examples when diagnosing multiple DTCs, one of which includes U**** Byte 71 DTC.
  • PIT3099R Jul 10, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about installing General Motors Accessory parts/kits.  Technicians should refer to Service Information for information regarding most accessories.  Technicians may also contac…
  • PIT5535D Jul 9, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about vehicles that may have Service Front Camera, Service Lane Departure Warning, and Service Lane Keep Assist Message. Technician may find Diagnostic Trouble Code B1008 Sym …
  • PIC6137F Jul 1, 2019 · Service Bulletin/Repair Instructions
    This Preliminary Information communication provides information to the technician about vehicles that the engine stops running after extended idle with shifter in park. Dealer should communicate to the customer this condition is a normal operating character…
  • 1308116001E Jun 26, 2019 · Service Bulletin/Repair Instructions
    The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
  • 100845001G Jun 26, 2019 · Service Bulletin/Repair Instructions
    This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
  • 090604026Q Jun 25, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
  • 060847001O Jun 11, 2019 · Service Bulletin/Repair Instructions
    This bulletin explains the labor operation numbers used for submitting warranty claims for module reprogramming and not when replacing a module.
  • 050604022Q Jun 26, 2019 · Service Bulletin/Repair Instructions
    This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
  • 000601012J Jun 25, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin advises about the possible issues that may occur when using a scotch brite pad or highly abrasive disk on gasket sealing surfaces or reused parts.
  • 19NA128 Jun 7, 2019 · Service Bulletin/Repair Instructions
    This technical bulletin provides a procedure to rebuild the transmission and install a snap ring retainer to eliminate the 1-3 clutch spring ring from coming out of the ring groove.
  • 19NA104 Jun 10, 2019 · Service Bulletin/Repair Instructions
    This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
  • 18NA343 Jun 12, 2019 · Service Bulletin/Repair Instructions
    This technical bulletin provides a procedure to remove grease and install BRS tape to the spacers for the seat frame to eliminate a squeak type noise.
  • 16NA338 Jun 6, 2019 · Service Bulletin/Repair Instructions
    This Bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper hand…
Source: NHTSA manufacturer communications files.