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2016 Cadillac CT6

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2016 CT6.

Body PASSENGER CARTransmission Automatic (S8)

The 2016 Cadillac CT6 entered the model line as a passenger car built around an eight-speed automatic and EPA-rated at 22 mpg city, 30 mpg highway, and 25 mpg combined, establishing the fuel-economy baseline against which subsequent model years can be measured. Across the five years tracked from 2016 to 2020, this inaugural model year accumulated 11 owner complaints — a tick above the 2018 low of 10 and well short of the 26 reported for 2017 — with the powertrain emerging as the dominant source of concern alongside three recorded recalls. For a researcher, that profile positions 2016 as a relatively measured opening chapter in the CT6's complaint history, with the powertrain's prominence as a trouble area offering a clear thread to track through the remainder of the model run.

Model year2020 2019 2018 2017 2016

Quick specs

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

EPA fuel economy22/30/25 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 25206377. 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.

Tire sizeP235/50R18; P245/45R19; P245/40R20OEM · verified

Wheel / rim8.0, 8.5, 8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	25206377 alt 12693541
Engine air filter	23418368 alt 23450879
Spark plug	12650283 alt 12681659
Battery	88864539
Front wiper blades	84574892 alt 84574893
Serpentine belt	12678130 alt 12664598
Thermostat	12630780 alt 12678784
Cabin air filter	13508023 alt 13356914

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic (S8)

Dimensions & weight NHTSA vPIC

Overall length	203.9 in
Overall width	74 in
Overall height	57.9 in
Wheelbase	122 in
Curb weight	3646 lb
Track (front / rear)	64.2 / 65 in
Weight distribution (front / rear)	51/49

Ratings & economy EPA / vPIC

EPA city / highway / combined	22 / 30 / 25 mpg
Drivetrain	Rear-Wheel Drive
Passenger volume	110 cu ft
Cargo volume	15 cu ft
Recommended fuel	Regular Gasoline

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.

5.0–6.1 sec0–60 mph (tested)quickest 5.00 sec — 2016 Platinum 3.0TT Sedan

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2016	Platinum 3.0TT Sedan 3.0L Twin-Turbo V6	5.00 sec	13.50 sec	404 hp	AWD
2016	Platinum 3.0TT Sedan 3.0L Twin-Turbo V6	5.00 sec	13.40 sec	404 hp	AWD
2016	Platinum 3.0TT Sedan 3.0L Twin-Turbo V6	5.40 sec	13.70 sec	404 hp	AWD
2016	Premium Luxury 3.6 Sedan 3.6L V6	5.90 sec	14.30 sec	335 hp	AWD
2016	Luxury 2.0T Sedan 2.0L Turbo I-4	6.10 sec	14.70 sec	265 hp	RWD
2017	Platinum 3.0TT Sedan 3.0L Twin-Turbo V6	4.70 sec	13.20 sec	404 hp	AWD
2017	Platinum 3.0TT Sedan 3.0L Twin-Turbo V6	5.10 sec	13.60 sec	404 hp	AWD
2017	2.0E Plug-In Hybrid Sedan 2.0L Turbo I-4 + Elec 18.4-kWh	5.20 sec	13.80 sec	335 hp	RWD

Service quick specs OEM factory data

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

This engine DOT 3 brake fluid. Torque the oil drain plug to 18.0 ft-lbs. The firing order is 1-2-3-4-5-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Lubricants & capacities

Automatic Transmission Fluid	DEXRON(R) HP Automatic Transmission Fluid.
Automatic Transmission Fluid Capacity	7.4
Brake Fluid	DOT 3
Brake Fluid Capacity	0.95-1.15
Power Steering Fluid	GM part number 89021184

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	89 inch lbs. ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs	84 inch lbs. ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs	89 inch lbs. ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Engine Oil Pan Drain Plug	15.0 ft-lbs
Engine Oil Pan Drain Plug	18.0 ft-lbs
Oil Pump to Cylinder BLock Bolts/Studs	18.0 ft-lbs
Engine Valve Cover Bolts	8.0 ft-lbs

Chassis torques

Driveshaft Flange to Transmission

41.0 ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-2-3-4-5-6
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	.037 - .043 in
Spark Plug Torque	15 ft-lbs
Spark Plug Manufacturer	AC Delco
Spark Plug Gap	.037 - .043 in
Spark Plug Torque	13 ft-lbs

Battery & A/C

Refrigerant	R134a
Oil Group	PAG
Oil Type	46

Service checks

Key ON Engine OFF (KOEO)	50-94
Key ON Engine OFF (KOEO)	50-100
Key ON Engine OFF (KOEO)	50-100
Engine Compression	100 psi
Engine Compression	140 psi
Engine Compression	100 min psi

Brakes

Minimum Pad Thickness	Front: 0.080; Rear: 0.080 in
Vented Rotor Minimum Thickness for Replacement	Front: 1.063 Discard; Rear: .827
Vented Rotor Minimum Thickness after Refinish	Front: 1.102; Rear: .866
Variation from Parallelism Thickness Variation	Front: .001; Rear: .002
Maximum Rotor Runout	0.002

Multi-step torque procedures OEM · verified

Steering Track (Rod End) Bolts — tightening sequence 1 stages

110

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

110

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

22.0 ft. lbs., Step 2: loosen all bolts completely, Step 3: 18.0 ft. lbs., Step 4: 110

22 ft. lbs

Cylinder Head — tightening sequence 2 stages

Prep Do not reuse old bolts.

1	22.0 ft. lbs.	22 ft. lbs
2	190 degrees	190 degrees

Cylinder Head — tightening sequence 4 stages

Prep Do not reuse the 11.0mm bolts. Ensure new bolts are the same thread pitch as the bolts being replaced. Failure to use bolts of the same thread pitch will cause engine damage or failure. · M11 Bolts

1	22.0 ft. lbs.	22 ft. lbs
2	60 degrees	60 degrees
3	60 degrees	60 degrees
4	60 degrees; M6 Bolts	60 degrees
1	8.9 ft. lbs.	8.9 ft. lbs

Cylinder Head — tightening sequence 4 stages

Prep Do not reuse any bolts. Coat new bolts with specified engine oil

1	59.0 ft. lbs.	59 ft. lbs
2	90 degrees	90 degrees
3	Bolts 7 and8 60 degrees	60 degrees
4	Bolt 9 40 degrees	40 degrees

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 7,500 mi; spark plugs every 60,000 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 mi	Accelerator Pedal (inspect) · Body Latches, Locks & Hinges (lubricate) · Brake Shift Interlock Solenoid (inspect) · Brake System (inspect) · Engine Oil (inspect fluid level) · Engine Oil Life Monitor (inspect)
Every 22,500 mi	Cabin Air Filter (replace)
Every 45,000 mi	Engine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect)
Every 60,000 mi	Spark Plugs (replace)
Every 97,500 mi	Spark Plug Wires (inspect) · Transfer Case Assembly (drain & refill)
At 150,000 mi	Accessory Drive Belt (inspect) · 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.

In 2016 the Cadillac CT6 logged 11 consumer complaints, three recalls and a substantial 1,369 Technical Service Bulletins (TSBs), which is the highest TSB count across the 2016‑2020 span. Compared with the surrounding years, complaints rose sharply in 2017 (26) before falling back to double‑digit levels in 2018‑2020, while recall activity remained modest (2‑4 per year) and investigations were absent throughout. The 2016 complaint profile is dominated by Power‑Train issues (five reports) and includes Air‑Bag and Engine problems, whereas crash‑related complaints were limited to three and there were no fire reports. This pattern suggests that 2016 sits at the early peak of TSB activity but not at an extreme recall or investigation risk, making it a relatively safe year to purchase provided the identified Power‑Train concerns are addressed.

Open recalls

NHTSA campaigns

1369

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

3 involved a crash · 0 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Overall★★★★★

Frontal★★★★★

Side★★★★★

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’16’17 ’18 ’19 ’20

Owner complaints filed with NHTSA, by component

All 11 complaints on record, top 5 components.

Power Train5

Air Bags2

Engine2

Power Train,Unknown Or Other,Fuel/Propulsion System1

Suspension,Wheels,Unknown Or Other1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

18V437000Seats:Mid/Rear AssemblyReported 28/06/2018

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… 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…

16V687000Seat Belts:Front:WebbingReported 23/09/2016

General Motors LLC (GM) is recalling certain model year 2016 Cadillac CT6 vehicles manufactured July 21, 2016, to July 22, 2016. The bolt that connects the front passenger seat belt webbing to the seat's anchor plate… Remedy: GM will notify owners, and dealers will replace the existing front passenger seat belt webbing anchor bolt, or install a bolt if it is missing, free of charge. The recall began on…

Technical service bulletins NHTSA · verified

Showing 5 of 1369 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
PIT3271Q	2026-04-01	Unknown Or Other	This preliminary information communicates information about how to determine if a wheel…
PIP6104	2026-03-09	Unknown Or Other	This Preliminary information communicates the steps on how to save a GDS2 Session Log and…
PIP4902V	2026-03-09	Unknown Or Other	This preliminary information advises a dealer on how to email GDS2 session logs into…
PIP5700G	2026-01-12	Unknown Or Other	This PI communicates the proper part numbers for transmission connectors and internal…
PIP4902U	2026-01-08	Unknown Or Other	This preliminary information advises a dealer on how to email GDS2 session logs into…

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.

Engine oil filter 25206377 Engine air filter 23418368 Spark plug 12650283 Battery 88864539

Reference guides

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

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

Does the 2016 CT6 have open recalls?

NHTSA lists 3 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the CT6 get?

EPA figures are 22 city / 30 highway / 25 combined mpg.