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2020 Cadillac CT6

Gas
Large Cars
2 EPA-rated configurations
Data refreshed 2026-10-26
B
Safety Signal
80 / 100 from the NHTSA recall record
Recalls1 critical 2
Complaints1 crash reported 11
Crash ratingnot rated by NHTSA —
Fuel economybest combined, EPA 21 mpg
20202019201820172016

The 2020 Cadillac CT6 is sold in the U.S. as a gas large sedan with 2 EPA-rated configurations. The most efficient version, the CT6 AWD, is EPA-rated at 21 mpg combined. NHTSA lists 2 recall campaigns for this model year, 1 rated critical, which gives it a Safety Signal grade of B. Owners have filed 11 complaints, most often about the power train.

Cadillac CT6 — photograph via Wikimedia Commons
Cadillac CT6 · Photo: JustAnotherCarDesigner · CC0 · Wikimedia Commons

Specs & fuel economy

Source: EPA fueleconomy.gov
ConfigurationPowertrainDriveEngine / motorCityHwyCombAnnual fuel*
CT6 AWDGasAWD3.6L 6-cyl182721$3,200
CT6 AWDGasAWD4.2L 8-cyl turbo142517$4,850

*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 41744, 42378.

Emissions & certification

Source: EPA emission certificates
ConfigurationSmog ratingEmission standardWhere it can be sold newSmartWay
CT6 AWD5 / 10California LEV-III ULEV70 / Federal Tier 3 Bin 70All 50 states (federal, all altitudes); California and states following California standards—
CT6 AWD3 / 10California LEV-III ULEV125 / Federal Tier 3 Bin 125All 50 states (federal, all altitudes); California and states following California standards—

Certified for all fifty states, so it can be registered new anywhere in the U.S. Gas-guzzler tax applies to CT6 AWD — a federal excise the manufacturer pays and prices in.

The smog rating scores tailpipe pollutants other than greenhouse gases, 1 (worst) to 10 (best), and is comparable only within a model year. The standard is the federal bin or California tier the configuration was certified to. Both come from the EPA certificate behind the window sticker.

Specifications filed with NHTSA

Source: NHTSA vPIC

Dimensions Exterior

Body styleSedan/Saloon
Doors4
GVWR classClass 1: 6,000 lb or less (2,722 kg or less)

Engine Basics

Cylinders6
Displacement3.6 L
Engine configurationV-Shaped

Fuel Economy

FuelGasoline

Seating

Seat rows2
Seating capacity5 seats

Transmission

DrivetrainAWD/All-Wheel Drive
TransmissionAutomatic
Transmission speeds10

Driver assistance

Standard: Adaptive cruise control, Anti-lock brakes, Automatic emergency braking, Backup camera, Blind-spot monitoring, Electronic stability control, Forward collision warning, Lane departure warning, Lane keeping assist, Parking assist, Pedestrian automatic emergency braking, Rear cross-traffic alert

Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: Luxury (CSAV), Platinum (CSAV), V-Series). Figures for the trim you are looking at may differ.

Dimensions & weight

Source: Transport Canada
Length205.9 in
Width (body, without mirrors)74.0 in
Height57.9 in
Wheelbase122.4 in
Track, front63.4 in
Track, rear64.2 in
Curb weight3,986–4,489 lb
Weight distribution, front/rear50/50

Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 4 configurations: Luxury AWD 4-door Sedan, Platinum AWD 4-door Sedan, Premium Luxury AWD 4-door Sedan, V-Series AWD 4-door Sedan. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.

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Factory warranty running out?

The 2020 Cadillac CT6 is in the years where transmission, electronics and drivetrain repairs land on the owner. What an extended plan does and does not cover is worth reading before a dealer quotes you one.

What to check before you buy →

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Recalls (2)

Source: NHTSA recall database
!critical

Power Train

N242480630
90,081 vehicles 71% reported repaired
Problem General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally and cause the wheels to lock-up. Risk Wheel lock-up while driving increases the risk of a crash. Fix Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242480630.
NHTSA campaign 25V148000 reported Mar 6, 2025 General Motors, LLC the full filing, and every vehicle covered →
●moderate

Tires

N192279200
81 vehicles 100% reported repaired built Aug 1, 2019 – Sep 9, 2019
Problem General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" wheels (RPO 5JO or SHH). The tire pressure monitoring system (TPMS) sensors use the incorrect wireless radio frequency and cannot illuminate the low pressure warning light when the tire pressure drops below the recommended level. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring Systems." Risk Drivers may drive the vehicle with low tire pressure without a low tire pressure warning, negatively impacting the vehicle handling and increasing the risk of a crash. Fix GM will notify owners, and dealers will replace all four TPMS sensors with the correct sensors, free of charge. The recall began December 3, 2019. Owners may contact GM customer service at 1-586-596-1733. GM's number for this recall is N192279200.
Filed with NHTSAOwner letter PDF
NHTSA campaign 19V731000 reported Oct 15, 2019 General Motors LLC the full filing, and every vehicle covered →

These are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.

Whether any of this applies to one specific CT6

A campaign covers a build range, not a model year, so two identical-looking cars from 2020 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Cadillac publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.

Hear about a recall before the letter does

The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2020 Cadillac CT6, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.

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Parts & accessories for the 2020 Cadillac CT6

Search by fitment on eBay Motors — OEM take-offs, aftermarket, and the trim pieces dealers no longer stock. The listing and the price are the seller's.

Find parts for this CT6 →

Owner complaints

Source: NHTSA complaint database
11complaints filed

1 involved a crash · 0 a fire · 0 injuries · 0 deaths reported

29 per 10,000 built · Cadillac reported 3,816 CT6 built (its Early Warning production report to NHTSA)

Filed per year: 2020: 3 · 2021: 1 · 2025: 7

Most-cited components

Power Train 6
Service Brakes 3
Forward Collision Avoidance 3
Suspension 1
Unspecified 1
Structure 1

In owners' own words

Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.

The contact owns a 2020 Cadillac CT6. The contact stated while driving 65 MPH, the transmission seized, and the vehicle was coasted over to the right side of the roadway while waiting for tow service. A dealer as contacted. The vehicle was towed to the dealer where it was diagnosed with transmission failure. The vehicle was not repaired.
Power Train at 98,000 miles Jul 15, 2025 NHTSA owner report · ODI 11673799
On friday, november 13, 2020 I was stopped at a stoplight in marysville, ohio. It appeared that traffic started to move, so I took my foot off the brake. Almost immediately the emergency braking feature engaged. While this tends to startle you because it is so abrupt, almost like a head-on collision, I pressed on the brake.
Service Brakes at 15,300 miles Nov 15, 2020 NHTSA owner report · ODI 11374732
The vehicle was shifting harshly and my wheels were experiencing lock up while in motion which was very dangerous. I experienced this on the parkway as well as streets and almost had a few accidents due to this problem. I drive my wife and children in this vehicle. Our safety and lives were put at risk.
Wheels Sep 30, 2025 NHTSA owner report · ODI 11690488
latelyi have had a problem with my back hatch door opening by it self the problem the last time it happen just before i enter a car wash now ive got a 7800 bill to repair it
Structure Feb 24, 2025 NHTSA owner report · ODI 11644679
The contact owns a 2020 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that while his wife was driving at an undisclosed speed, the vehicle jerked before slamming into gear. No warning lights were illuminated.
Power Train Jun 17, 2025 NHTSA owner report · ODI 11667446
The contact owns a 2020 Cadillac Ct6. The contact stated that while depressing the brake pedal, there was a loud screeching sound coming from the wheels. The vehicle was taken to woodland Cadillac located at 530 quality cir #101, woodland, ca 95776, to be diagnosed.
Service Brakes at 100 miles Nov 12, 2020 NHTSA owner report · ODI 11374281

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Reported by Cadillac itself: 2 death-or-injury claims on this model year in its quarterly Early Warning reports to NHTSA (49 CFR 579.21): 2 injured, as claimed, not verified — about 52 per 100,000 built. Every CT6 model year, by year and system → Dated and by system, they are exhibit F of the defect dossier.

Crash ratings

Source: NHTSA NCAP

NHTSA has not published 5-Star crash ratings for this model year.

Driver-assist crash reports (1)

Source: NHTSA Standing General Order 2021-01
1report filed

1 severity unknown

Jun 2025 to Jun 2025 · 1 with an air bag deployment · 0 towed

What was engaged, and what was hit

System named: Level 2 (1)

Crash partner: Animal 1

Filed by: General Motors, LLC

IncidentSystemStruckInjury allegedStateSpeedReport
Jun 2025Level 2 · Level 2AnimalunknownNJ43 mph540-11300

From the manufacturer’s own filing

The reporting entity’s narrative as NHTSA published it, with anything identifying removed and nothing added. A narrative is a notice, written before the entity had verified what happened.

On June [redacted], 2025, a 2020 Cadillac CT6 was traveling westbound on [redacted] in Bridgewater, New Jersey with Super Cruise engaged and active. According to OnStar audio recordings, the driver reported hitting a deer that crossed in front of the vehicle. Crash data indicated a frontal impact that deployed the seat belt pretensioners and airbags.
General Motors, LLC report 540-11300 Jun 2025 NHTSA SGO filing

A report under the General Order is a notice the manufacturer or operator must file within days of hearing of a crash in which a Level 2 driver-assist or automated-driving system was engaged within 30 seconds of impact. It is filed before anything is verified, and entities with telematics hear of far more crashes than entities that rely on complaints, so counts say as much about the reporting as about the car and are not comparable across makes. Nothing is normalised by fleet size. Every report on file, by make and year → · NHTSA’s page and files

Service bulletins & campaigns

Source: NHTSA manufacturer communications
Extended coverage on file 6 filings by the manufacturer with NHTSA naming this model year

The term and the vehicles it covers are the manufacturer’s, as NHTSA’s summary of each filing states them; a dealer checks one particular car by its VIN. Every GM warranty extension (33) → · Every warranty extension on file, all makes →

Communicationsfiled with NHTSA 753
Most recentmanufacturer date 2026-09-26
Kindsas classified by NHTSA 739 service bulletins, 11 service campaigns, 2 warranty extensions

Most often about: Equipment, Engine, Electrical System, Unknown Or Other, Power Train.

  • PIT5698F Service bulletin
    2026-09-26 · Unknown Or Other
  • This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
  • PIP4902W Service bulletin
    2026-09-04 · Unknown Or Other
  • This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • PIT5099J Service bulletin
    2026-07-21 · Unknown Or Other
  • PI to help diagnose A/C concern
  • PIT3271Q Service bulletin
    2026-04-01 · Unknown Or Other
  • This preliminary information communicates information about how to determine if a wheel and tires size change is available.
  • PIP6104 Service bulletin
    2026-03-09 · Unknown Or Other
  • 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 Service bulletin
    2026-03-09 · Unknown Or Other
  • This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
  • PIT6425D Service bulletin
    2026-03-02 · Unknown Or Other
  • This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
  • PIT6425C Service bulletin
    2026-01-16 · Unknown Or Other
  • This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.

Diagnostic trouble codes on file

Source: NHTSA manufacturer communications and complaints

Codes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.

CodeWhat it meansMost often filed underWhere it appears
P0300
P0300 on Cadillac →
Misfire detected, but not isolated to one cylinder.Engine · Ignition coils →8 bulletins
C0024
C0024 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Service Brakes · Brake pads →5 bulletins
P0016
P0016 on Cadillac →
The crankshaft and camshaft are not where they should be relative to each other — timing, chain or phaser.Engine5 bulletins
P0018
P0018 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Engine5 bulletins
P0747
P0747 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Power Train5 bulletins
B3055
B3055 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Power Train4 bulletins
B3060
B3060 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Power Train4 bulletins
B3935
B3935 on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Power Train4 bulletins
P0308
P0308 on Cadillac →
Cylinder 8 is misfiring.Engine · Ignition coils →4 bulletins
P050D
P050D on Cadillac →
Manufacturer-defined — the meaning is set by the automaker, not the standard.Engine4 bulletins
P0442
P0442 on Cadillac →
A small leak in the evaporative emissions system.Electrical System · Gas cap →3 bulletins
P0455
P0455 on Cadillac →
A large leak in the evaporative emissions system — often a fuel cap left off.Electrical System · Gas cap →3 bulletins

Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.

Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.

At the New York inspection station

Source: New York State DMV

In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2020 Cadillac CT6 failed the emissions check on 4.9% of first inspections — higher than the 2.2% for every 2020 model-year vehicle inspected; and the safety inspection on 2.4% (every 2020 vehicle: 1.6%).

New York inspections 4.9%

failed emissions

207 initial inspections of 199 vehicles.

MeasureThe 2020 CT6Every 2020 vehicleBehind it
Failed the emissions check4.9%2.2%205
Failed the safety inspection2.4%1.6%207
Air-bag warning lamp stayed lit0.48%0.19%207
Miles driven a year6,7299,980odometer at inspection
Average odometer42,18662,630odometer at inspection

New York’s emissions test on these model years is an on-board diagnostics check: it fails a car whose check-engine light is on or whose self-tests have not finished. First inspections only, so a car that failed and came back is counted once; private and special plates, not taxis, livery or commercial plates. A rate appears only where at least 200 inspections stand behind it. “Every 2020 vehicle” is every 2020 model-year car, SUV and pickup inspected in the same window, all makes. This is the state’s record of test results, not a reliability score by itself. Source: New York State Department of Motor Vehicles, Vehicle Inspections (data.ny.gov, Open NY terms).

Common questions about the 2020 CT6

Source: EPA, NHTSA and manufacturer press kits

Does the 2020 Cadillac CT6 have any recalls?

NHTSA has posted 2 recall campaigns for the 2020 Cadillac CT6, 1 of them rated critical. The most serious on file is 25V148000, covering Power Train. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.

How safe is the 2020 Cadillac CT6?

NHTSA has not published a crash-test rating for the 2020 Cadillac CT6 yet. On the recall record WhichTrim grades it B (80/100), which measures open and severe recalls rather than crash protection.

What is the fuel economy of the 2020 Cadillac CT6?

Across the 2 EPA-rated configurations of the 2020 Cadillac CT6, the best EPA combined figure is 21 mpg. Figures are the EPA's own, per configuration, and every one is listed above.

What are the dimensions of the 2020 Cadillac CT6?

Transport Canada measured it at 205.9 in long, 74.0 in wide (body, without mirrors), 57.9 in tall, on a 122.4 in wheelbase. Curb weight: 3,986–4,489 lb depending on configuration. Those are its measurements of the North American versions; every figure is in the table above.

What do owners complain about on the 2020 Cadillac CT6?

Owners have filed 11 complaints with NHTSA about the 2020 Cadillac CT6, most often about power train, service brakes, forward collision avoidance. Of those, 1 involved a crash. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.

How clean is the 2020 Cadillac CT6?

The EPA smog rating for the 2020 Cadillac CT6 runs 3 to 5 out of 10 across its configurations. That score covers tailpipe pollutants other than greenhouse gases, and it only compares vehicles within the same model year. It is certified for all fifty states, so it can be registered new anywhere in the U.S. Its configurations were certified to different standards — California LEV-III ULEV125, California LEV-III ULEV70, Federal Tier 3 Bin 125, Federal Tier 3 Bin 70 — which the table above lists per configuration.

Are there service bulletins for the 2020 Cadillac CT6?

The manufacturer has filed 753 service bulletins and related communications with NHTSA for the 2020 Cadillac CT6, most often covering equipment, engine, electrical system. The most recent is dated 2026-09-26. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.

How does the 2020 Cadillac CT6 do at state inspection?

In New York’s inspection lanes over the 12 months to Oct 10, 2026, the 2020 Cadillac CT6 failed the emissions check on 4.9% of first inspections — higher than the 2.2% for every 2020 model-year vehicle inspected; and the safety inspection on 2.4% (every 2020 vehicle: 1.6%). The figures are New York State DMV’s own inspection records, first inspections only, and the table above sets each one against every vehicle of the same model year.

What we hold, and what an empty row means

Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.

DataHeldSourceWhat it covers — or what empty means
Fuel economy & configurations2 configurationsEPA certification recordsEvery configuration the EPA certified for sale, with its own test figures.
Emission certificates2 configurationsEPA emission certificatesSmog rating, standard and the sales area that decides where the car can be sold new.
Recalls2NHTSA recall campaignsA complete federal register: every campaign covering this model year, with severity and advisory flags.
Owner complaints11NHTSA complaint databaseAlso complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold.
Crash ratingsnoneNHTSA NCAPNHTSA has not tested this model year. Cars are selected for testing, so untested is not unsafe.
Service bulletins753NHTSA manufacturer communicationsEverything the manufacturer told its dealers about a defect or malfunction, short of a recall.
InvestigationsnoneNHTSA Office of Defects InvestigationNo defect investigation has been opened.
Driver-assist crash reports1NHTSA Standing General Order 2021-01Crashes the manufacturer or operator reported with a Level 2 or automated-driving system engaged. Notices, filed before verification; not comparable across makes.
Specifications filed with NHTSA12 fieldsNHTSA vPIC, decoded from VIN patternsWhat the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder.
Measured dimensions7 fieldsTransport Canada, Canadian Vehicle SpecificationsLength, width, height, wheelbase, track and curb weight, measured on the North American versions.
Trims, pricing & equipmentnoneManufacturer press kitWe have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind.

Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.

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