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2015 Cadillac CTS Coupe

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2015 CTS Coupe.

Body PASSENGER CARTransmission Automatic (S6)

The 2015 Cadillac CTS Coupe is a passenger car featuring an S6 automatic transmission and an engine requiring 6.0 quarts of 5W-30 oil. This model delivers an EPA-rated fuel economy of 12 city, 18 highway, and 14 combined mpg. Reliability data for this year indicates four recalls and 47 total owner complaints, with the power train emerging as the top area of concern.

Quick specs

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

Engine oil capacity6.0 qtOEM · verified

Engine oil type5W-30OEM · verified

EPA fuel economy12/18/14 mpgEPA · verified

Fitment & sizes

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

From the factory this vehicle uses a BCI 48 · 660 CCA battery, 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.

Battery groupBCI 48 · 660 CCAOEM · verified

Tire sizeP245/45R17OEM · verified

Wheel / rim8.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	25206377 alt 12731742
Engine air filter	20857930 alt 22844634
Spark plug	12681660 alt 12662396
Battery	88864542 alt 88866309
Front wiper blades	84017839 alt 84017838
Serpentine belt	12648981 alt 19180340
Thermostat	12587397 alt 89018168
Cabin air filter	13508023 alt 19130403

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic (S6)

Dimensions & weight NHTSA vPIC

Overall length	195.7 in
Overall width	72 in
Overall height	57.1 in
Wheelbase	114.6 in
Curb weight	3777 lb
Track (front / rear)	61.4 / 61.8 in
Weight distribution (front / rear)	50/50

Ratings & economy EPA / vPIC

EPA city / highway / combined	12 / 18 / 14 mpg
Drivetrain	Rear-Wheel Drive
Passenger volume	99 cu ft
Cargo volume	15 cu ft
Recommended fuel	Premium Gasoline

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, SAE 75W · Synthetic in the differential, DOT 3 brake fluid. Torque the oil drain plug to 18.0 ft-lbs. The firing order is 1-8-7-2-6-5-4-3. 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

Brake Fluid	DOT 3
Brake Fluid Capacity	0.99
Differential Gear Oil	Synthetic · GL-5 · SAE 75W · SAE 75W
Differential Gear Oil	SAE 75W · Synthetic · SAE 75W
Differential Gear Oil Capacity	1.0-1.3
Differential Gear Oil	SAE 75W · Synthetic
Differential Gear Oil Capacity	1.0-1.4
Engine Coolant	50

Engine torques

Camshaft Bearing/Carrier Cap Bolts or Studs	89 inch lbs. ft-lbs
Camshaft Bearing/Carrier Cap Bolts or Studs	89 inch lbs. ft-lbs
Engine Flywheel Bolts	49.0 ft-lbs
Exhaust Manifold to Cylinder Head Bolts	34
Engine Oil Pan Drain Plug	18.0 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

Chassis torques

Driveshaft Flange to Transmission	41.0 ft-lbs
Front Wheel Hub	Sedan - 158 ft-lbs
Front Wheel Hub Bearing Housing Bolts	Sedan - Install a new retaining nut. ft-lbs

Ignition

Cylinder Firing Order	1-3-4-2
Cylinder Firing Order	1-2-3-4-5-6
Cylinder Firing Order	1-8-7-2-6-5-4-3
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

Battery & A/C

Refrigerant	R134a
Refrigerant Capacity	19.2 lbs
Oil Group	PAG
Oil Capacity	3.72 oz
Standard BCI Group Number	48
Standard BCI Cranking Performance	660 cca
Optional BCI Group Number	94R
Optional BCI Cranking Performance	730 cca

Service checks

Pressure Test	15 psi
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	188-206 °F
Pressure Test	15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief	15 psi
Thermostat Opening Temperature	194-225 °F
Pressure Test	15, Pressure should not exceed 20 psi.
Radiator Cap Pressure Relief	15 psi

Brakes

Brake Caliper Bolt to Carrier Torque	Front: 22.0; Rear: 27
Brake Caliper Carrier to Hub Bolt Torque	Front: 111; Rear: 96 /; Front: 111 Then; Rear: 74 Then
ABS Sensor Torque	7.5 / NS
Minimum Pad Thickness	Front: 0.030; Rear: 0.030 in
Vented Rotor Minimum Thickness for Replacement	Front: 1.063 Discard; Rear: .827; Front: 1.259; Rear: 1.023
Vented Rotor Minimum Thickness after Refinish	Front: 1.102; Rear: .866
Variation from Parallelism Thickness Variation	Front: .001; Rear: .002
Maximum Rotor Runout	.002

Multi-step torque procedures OEM · verified

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

26.0, Step 2

40 degrees

Camshaft Sprocket and/or Gear Bolt(s) — tightening sequence 1 stages

48.0 ft. lbs., Step 2: 90

48 ft. lbs

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

18.0 ft. lbs., Step 2: 110

18 ft. lbs

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

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

15.0 ft. lbs., Step 2: 85

15 ft. lbs

Cylinder Head — tightening sequence 2 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts:

1	22.0 ft. lbs.	22 ft. lbs
2	150 degrees; M8 Bolts:	150 degrees
1	11.0 ft. lbs.	11 ft. lbs
2	75 degrees	75 degrees

Cylinder Head — tightening sequence 2 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts:

1	22.0 ft. lbs.	22 ft. lbs
2	150 degrees; M8 Bolts:	150 degrees
1	11.0 ft. lbs.	11 ft. lbs
2	75 degrees	75 degrees

Cylinder Head — tightening sequence 2 stages

Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts:

1	37.0 ft. lbs.	37 ft. lbs
2	55 degrees; M8 Bolts:	55 degrees
1	22.0 ft. lbs.	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

Engine Flywheel Bolts — tightening sequence 1 stages

39.0 ft. lbs., Step 2: 25

39 ft. lbs

Engine Flywheel Bolts — tightening sequence 1 stages

22.0 ft. lbs., Step 2: 45

22 ft. lbs

Engine Flywheel Bolts — tightening sequence 1 stages

11.0 ft. lbs., Step 2: 22.0 ft. lbs., Step 3: 45

11 ft. lbs

Intake Manifold to Engine Bolts — tightening sequence 1 stages

3.6 ft. lbs., step 2: 7.4

3.6 ft. lbs

Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages

11 ft. lbs., step 2: 15

11 ft. lbs

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 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 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 30,000 mi	Clutch Hydraulic System (drain & refill)
Every 45,000 mi	Brake Hydraulic System (drain, refill & bleed) · Drive Axle Assembly (drain & refill) · Engine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect) · Transmission Assembly (drain & refill)
Every 97,500 mi	Accessory Drive Belt (inspect) · Spark Plug Wires (inspect) · Spark Plugs (replace)
At 150,000 mi	Engine Coolant System (drain, flush & refill) · Intercooler (drain & 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.

Owner complaints about the 2015 Cadillac CTS Coupe dominate in one area — the power train, 16 of 47 reports (34%), well ahead of the next concern. None of this vehicle's 3 recall campaigns target the power train, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 2 of the reports describe a crash and 2 a fire — a small share of the total, but worth weighing against the power train pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.

Open recalls

NHTSA campaigns

1796

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

2 involved a crash · 2 a fire

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

Overall★★★★★

Frontal★★★★★

Side★★★★★

Rollover★★★★★

Owner complaints filed with NHTSA, by component

All 47 complaints on record, top 8 components.

Power Train16

Unknown Or Other5

Electrical System3

Equipment2

Suspension2

Vehicle Speed Control,Service Brakes2

Suspension,Service Brakes,Engine1

Steering1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 3 campaigns on record for this vehicle.

18V595000Seats:Front Assembly:Seat Heater/CoolerReported 07/09/2018

General Motors LLC (GM) is recalling certain 2014-2016 Cadillac CTS vehicles, equipped with heated front seats. The flexible heating mats in the front seats may be damaged over time, resulting in the seat heaters… Remedy: GM will notify owners, and dealers will recalibrate the body control module, disabling the automatic activation of the heated seat when the vehicle is remotely started, free of…

15V358000Service Brakes, Hydraulic:Pedals And LinkagesReported 09/06/2015

General Motors LLC (GM) is recalling certain model year 2015 Cadillac ATS and CTS vehicles. The affected vehicles have a bracket between the brake pedal assembly and the rod that actuates the brakes that may fracture… Remedy: GM will notify owners, and dealers will inspect the vehicle and replace any affected bracket, free of charge. The recall began July 6, 2015. Owners may contact Cadillac customer…

Technical service bulletins NHTSA · verified

Showing 5 of 1796 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…
PIP4902U	2026-01-08	Unknown Or Other	This preliminary information advises a dealer on how to email GDS2 session logs into…
PIT5214G	2025-11-20	Unknown Or Other	This Preliminary Information communication provides information to the technician about…

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 CTS Coupe. 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.

Group 48 battery Vehicles taking 6.0 qt Engine oil filter 25206377 Engine air filter 20857930 Spark plug 12681660 Battery 88864542

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

How much oil does the 2015 CTS Coupe take?

6.0 qt of Synthetic Blend is recommended. Use SAE 5W-30 viscosity grade engine oil. Use only engine oil licensed to the dexos 1 specification, or equivalent, of the proper SAE viscosity grade., per the factory manual.

Does the 2015 CTS Coupe have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the CTS Coupe get?

EPA figures are 12 city / 18 highway / 14 combined mpg.