CadillacCT62020Overview/cadillac/ct6/2020/base/

2020 Cadillac CT6

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2020 CT6.

The 2020 Cadillac CT6 carries a 6.0‑quart oil capacity spec calling for 5W‑30 viscosity, and its reliability profile shows 11 total owner complaints with the power train emerging as the leading concern alongside two recalls. Across the 2016–2020 model run, complaint volume peaked at 26 in 2017 and bottomed out at 10 in 2018, placing the 2020 edition just above the series low. That positioning suggests the final model year maintained the improved trend established after the 2017 spike, though the power‑train focus and recall count warrant attention for anyone researching long‑term durability.

Model year20202019201820172016

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

Engine oil capacity6.0 qtOEM · verified
Engine oil type5W-30OEM · verified
Lug nut torque111.0 ft-lbsOEM · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI 49 This vehicle requires an AGM VRLA battery to be used. Battery is vented outside of the vehicle. · 900 CCA battery, OE oil filter 12731742. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI 49 This vehicle requires an AGM VRLA battery to be used. Battery is vented outside of the vehicle. · 900 CCAOEM · verified
Tire size245/40ZR20 95YOEM · verified
Wheel / rim8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter12731742
Engine air filter23458700 alt 84166540
Spark plug12672175 alt 12646780
Front wiper blades84574893 alt 84574892
Serpentine belt12668146 alt 12639018
Thermostat12661950 alt 12587397
Cabin air filter23195727 alt 13508023

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length205.9 in
Overall width74 in
Overall height57.9 in
Wheelbase122.4 in
Curb weight3986 lb
Track (front / rear)63.4 / 64.2 in
Weight distribution (front / rear)50/50

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the CT6 of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

4.7–7.5 sec0–60 mph (tested)quickest 4.70 sec — 2017 Platinum 3.0TT Sedan
YearTrim / engine0–60¼ mileHPDrivetrain
2019Premium Luxury Sedan 2.0L Turbo I-47.50 sec15.70 sec237 hpRWD
2017Platinum 3.0TT Sedan 3.0L Twin-Turbo V64.70 sec13.20 sec404 hpAWD
2017Platinum 3.0TT Sedan 3.0L Twin-Turbo V65.10 sec13.60 sec404 hpAWD
20172.0E Plug-In Hybrid Sedan 2.0L Turbo I-4 + Elec 18.4-kWh5.20 sec13.80 sec335 hpRWD
2017Luxury 2.0T Sedan 2.0L Turbo I-46.40 sec14.70 sec265 hpRWD
2016Platinum 3.0TT Sedan 3.0L Twin-Turbo V65.00 sec13.50 sec404 hpAWD
2016Platinum 3.0TT Sedan 3.0L Twin-Turbo V65.00 sec13.40 sec404 hpAWD
2016Platinum 3.0TT Sedan 3.0L Twin-Turbo V65.40 sec13.70 sec404 hpAWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

This engine holds 6.0 qt of 5W-30 engine oil, 75W-90 in the differential, DOT 3 brake fluid. Torque lug nuts to 111.0 ft-lbs. The firing order is 1–5–4–3–6–8–7–2.

Lubricants & capacities

Automatic Transmission FluidDexron® ULV
Automatic Transmission Fluid Capacity12.08
Brake FluidDOT 3
Brake Fluid Capacity0.909 pt
Differential Gear Oil75W-90
Engine CoolantDex-Cool
Engine CoolantDex-Cool
Engine Oil5W-30

Engine torques

Crankshaft Position (CKP) Sensor Bolt(s)7.4 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)7.4 ft-lbs
Crankshaft Position (CKP) Sensor Bolt(s)7.4 ft-lbs
Camshaft Position (CMP) Sensor Bolt(s)11.0 ft-lbs
Engine Coolant Temperature (ECT) Sensor Bolt(s)6.6 ft-lbs
Oxygen (O2S) Sensor Bolt(s)31.0 ft-lbs
Knock Sense (KS) Bolt(s)18.0 ft-lbs
Engine Coolant Temperature (ECT) Sensor Bolt(s)18.0 ft-lbs

Chassis torques

Differential Fill PlugFront: 37.0; Rear: 205mm
Differential drain PlugFront: 37.0; Rear: 205mm
Driveshaft Flange to TransmissionFront: 43.0; Rear: 66.0 ft-lbs
Lug Nuts111.0 ft-lbs
Transfer Case Fill Plug15.0 ft-lbs
Transfer Case Drain Plug15.0 ft-lbs
Automatic Transmission Drain Plug9.0 ft-lbs

Ignition

Cylinder Firing Order1-2-3-4-5-6
Cylinder Firing Order1–5–4–3–6–8–7–2
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.035 in
Spark Plug Torque13.0 ft-lbs
Spark Plug ManufacturerAC Delco
Spark Plug Gap0.0295 in
Spark Plug Torque12.0 ft-lbs

Battery & A/C

RefrigerantR1234yf
Oil GroupPAG
Standard BCI Group Number49
Standard BCI Cranking Performance900 cca

Service checks

Key ON Engine OFF (KOEO)50.0-100.0
Engine Compression100
Intake Valve Lash0.0003–0.0016 in
Exhaust Valve Lash0.0003–0.0016 in
Intake Valve Lash0.0003–0.0016 in
Exhaust Valve Lash0.0003–0.0016 in

Brakes

Brake Caliper Bolt to Carrier TorqueFront: 30; Rear: 30
ABS Sensor TorqueFront: 7.4; Rear: 7.4
Minimum Pad ThicknessFront: 0.787; Rear: 0.787 in
Vented Rotor Minimum Thickness for ReplacementFront: 1.063; Rear: 0.827
Vented Rotor Minimum Thickness after RefinishFront: 1.102; Rear: .866
Vented Rotor Maximum Scoring DepthFront: 0.059; Rear: 0.059
Variation from Parallelism Thickness VariationFront: .001; Rear: .001
Maximum Rotor RunoutFront: 0.002; Rear: 0.002

Multi-step torque procedures OEM · verified

Steering Track (Rod End) Bolts — tightening sequence 1 stages
185°-95°
Front Wheel Hub — tightening sequence 1 stages
174.0 ft. lbs., 60°-75°74 ft. lbs
Rear Wheel Hub — tightening sequence 1 stages
174.0 ft. lbs., 60°-75°74 ft. lbs
Camshaft Sprocket and/or Gear Bolt(s) — tightening sequence 1 stages
115.0 ft. lbs. Step 2: 45°15 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
118.0 ft. lbs. Step 2: 110°18 ft. lbs
Connecting Rod (Large End) Bearings — tightening sequence 1 stages
115.0 ft. lbs. Step 2: 85°15 ft. lbs
Crankshaft Pulley and/or Center Bolts — tightening sequence 1 stages
174.0 ft. lbs. Step 2: 150°74 ft. lbs
Crankshaft Pulley and/or Center Bolts — tightening sequence 1 stages
159.0 ft. lbs. Step 2: 120°59 ft. lbs
Oil Pump to Cylinder BLock Bolts/Studs — tightening sequence 1 stages
111.0 ft. lbs. Step 2: 110°11 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the spark plugs every 97,500 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

Every 7,500 miAccelerator Pedal (inspect) · Body Latches, Locks & Hinges (lubricate) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · CV Joint Boot (inspect) · Engine Air Filter Element (inspect)
Every 15,000 miWindshield Wiper Blade (replace)
Every 22,500 miCabin Air Filter (replace)
Every 45,000 miEngine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect)
Every 75,000 miHood Hinge (inspect)
Every 97,500 miSpark Plug Wires (inspect) · Spark Plugs (replace) · Transfer Case Assembly (drain & refill)
At 150,000 miAccessory Drive Belt (inspect) · Drive Axle Assembly (drain & refill) · Engine Coolant System (drain, flush & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2020 Cadillac CT6 concludes a generation characterized by a consistent downward trend in Technical Service Bulletins, which fell from 1,369 in 2016 to 750 in 2020. Consumer complaints for the 2020 model year stood at 11, a figure significantly lower than the 2017 peak of 26 and consistent with the lows of 2016 and 2018. Recall activity remained stable across the generation, with 2020 recording 2 recalls, matching the frequency seen in 2017 and 2018. Within the 2020 data, the most frequent complaints targeted the Power Train, although the data does not specify the root cause of these issues. The record further notes two crash-related complaints and zero fire complaints for the target year. Given the reduced volume of TSBs and the low number of complaints and recalls relative to earlier years, this is a good year to buy.

2
Open recalls
NHTSA campaigns
750
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
11
Owner complaints
2 involved a crash · 0 a fire
Owner complaints by model year NHTSA · this generation & adjacent

Owner complaints filed with NHTSA, by component

All 11 complaints on record, top 7 components.

Power Train5
Power Train,Wheels1
Structure1
Unknown Or Other,Forward Collision Avoidance1
Service Brakes,Forward Collision Avoidance1
Suspension,Service Brakes1
Service Brakes1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 2 campaigns on record for this vehicle.

19V731000Tires:Pressure Monitoring And Regulating SystemsReported 15/10/2019

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… Remedy: 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…

25V148000Power Train:Automatic TransmissionReported 06/03/2025

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… Remedy: Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025. Owners may contact Cadillac customer…

Technical service bulletins NHTSA · verified

Showing 5 of 750 bulletins on record with NHTSA.

BulletinDateComponentSummary
PIT3271Q2026-04-01Unknown Or OtherThis preliminary information communicates information about how to determine if a wheel…
PIP61042026-03-09Unknown Or OtherThis Preliminary information communicates the steps on how to save a GDS2 Session Log and…
PIP4902V2026-03-09Unknown Or OtherThis preliminary information advises a dealer on how to email GDS2 session logs into…
PIT6425D2026-03-02Unknown Or OtherThis Preliminary information communicates to the field on how to diagnosis a GPS issue…
PIT6425C2026-01-16Unknown Or OtherThis Preliminary information communicates to the field on how to diagnosis a GPS issue…

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420
Catalyst system efficiency below threshold — Bank 1
P0300
Random / multiple cylinder misfire detected
P0171
System too lean — Bank 1
P0455
Evaporative emission system leak detected — large leak
P0128
Coolant thermostat below regulating temperature
P0442
Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN
Decode a VIN to confirm the transmission and build data for a specific CT6. OEM
Build data
Plant, GVWR class, engine and body data for any 17-character VIN.
Recalls
Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Reference guides

Cross-vehicle references for the kinds of data on this page.

Frequently asked

How much oil does the 2020 CT6 take?

6.0 qt of 5W-30 Use GM Dexos 1 Oil or equivalent, per the factory manual.

Does the 2020 CT6 have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.