Engine Assembly-Cylinder Block & Internal Parts fit your 2016 Cadillac CT6

Currently shopping for

2016 Cadillac CT6

Change Vehicle

Categories Close X

Currently selected

Engine

Other Categories

Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware

Body Mounting, Air Conditioning, Audio/Entertainment

Body Wiring, Roof Trim

Brakes

Brakes, Rear Axle, Propeller Shaft, Wheels, Tires

Cooling System, Grille, Oil System

Frames, Springs, Shocks, Bumpers

Front End Sheet Metal, Heater

Front Suspension, Steering

Fuel System, Exhaust, Emission System

Interior Trim, Front Seat Trim, Seat Belts

Rear Glass, Seat Parts, Adjuster

Rear Seat Trim, Carpet

Starter, Generator, Ignition, Electrical, Lamps

Transfer Case

Transmission - Automatic

Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors

Parts Questions

Sort by:

Recommended

Part No. & Part Description

Price & Qty.

Part No. &
Part Description

12670746
VALVE, Engine Oil Pressure, VALVE,OIL PUMP FLOW CONTROL(INCLUDES 103,104,115)
$94.07 $54.05
1
Add To Cart

24504031
SEAL, Engine Timing Gear Oil, SEAL,TIMING CHAIN OIL NOZZLE (O RING)(PART OF 169)(6.07 INSIDE DIAMETER; 1.78 DIAMETER)(1.516)
$17.88 $10.80
1
Add To Cart

SENSOR, Coolant Temperature (Engine Unit)
12650595
SENSOR, ENGINE COOLANT TEMPERATURE(INCLUDES 47)(W/O GASKET OR SEAL)
Fitting Vehicle Options: KJ,KL,KM69(LGW,M5X)
$16.14 $7.77
1
Add To Cart
12650595
SENSOR, ENGINE COOLANT TEMPERATURE(INCLUDES 46)(W/O GASKET OR SEAL)
- Fitting Vehicle Options: KH,KJ,KL,KM69(LGX,M5N)
$16.14 $7.77
1
Add To Cart

RING KIT, Engine Piston
89018107
RING KIT, PISTON(STD)
Fitting Vehicle Options: KH,KJ(LTG)
Require Quantity: 04
Package Quantity: 1
$36.94 $22.30
1
Add To Cart
12672036
RING KIT, PISTON
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
- Require Quantity: 06
- Package Quantity: 1
- Replaced By: 12705385
$44.19 $28.09
1
Add To Cart
12672413
RING KIT, PISTON(*KIT3)
- Fitting Vehicle Options: KJ,KL,KM(LGW,M5X)
$66.35 $42.16
1
Add To Cart

55488247
SENSOR, Engine Oil Pressure/Temperature, SENSOR,ENGINE OIL PRESSURE(CONNECT POKE-YOKE (ALIGNMENT TAB) ON VOLTAGE SUPPLY PINION OF TERMINAL)(INCLUDES 19)(MATING CONNECT USE 19301717 3-WAY W/LEADS)(HAS FLAT/OVAL CONNECT)
- Replaced By: 12727099
$46.49 $24.65
1
Add To Cart

11588468
BOLT, Transmission Converter, BOLT,TRANSAXLE TORQUE CONVERTER(M10X1.5X15)
- Require Quantity: 03
- Package Quantity: 10
$1.47 $0.94
10
Add To Cart

12626923
SEAL, Engine Front Cover & Crankshaft Seal, SEAL,CRANKSHAFT FRONT OIL
$31.41 $18.98
1
Add To Cart

PISTON KIT, Engine Piston
12674055
PISTON KIT, ENGINE(INCLUDES 8-10)
Location: Passenger Side
Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$57.59 $36.61
1
Add To Cart
12674056
PISTON KIT, ENGINE(INCLUDES 8-10)
- Location: Driver Side
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$81.56 $51.84
1
Add To Cart
12652809
PISTON KIT, ENGINE(INCLUDES 106,107,109)
- Fitting Vehicle Options: KH,KJ(LTG)
- Require Quantity: 04
- Package Quantity: 1
$26.85 $17.06

BOLT, Engine Connecting Rod Cap
11519680
BOLT, CONNECT ROD(PART OF 7)(M9X1X53)
Fitting Vehicle Options: KJ,KL,KM(LGW), KH,KJ,KL,KM(LGX)
Require Quantity: 12
Package Quantity: 10
$4.62 $2.93
10
Add To Cart
11548927
BOLT, CONNECT ROD(PART OF 110)(M9X1X48)
- Fitting Vehicle Options: KH,KJ(LTG)
- Require Quantity: 08
- Package Quantity: 1
$22.54 $13.62
1
Add To Cart

BOLT, Engine Oil
11588728
BOLT, LOWER CRANKCASE(M8X1.25X50 OUTSIDE DIAMETER-8.8)(REDUCED BODY)(*KIT1)(3.671)
Fitting Vehicle Options: KH,KJ,KL(LTG)
$10.22 $6.50
1
Add To Cart
11588733
BOLT, HEX FLANGED HEAD,M8X1.25X80.8,21.6 THREAD, 18 OUTSIDE DIAMETER, 8.8 STEEL, GMW3359(LOWER CRANKCASE)(8.900)
- Require Quantity: 10
- Package Quantity: 1
$11.74 $7.46
1
Add To Cart
11547866
BOLT, LOWER CRANKCASE(M10X2X116)
- Fitting Vehicle Options: KH,KJ,KL(LTG)
$7.39 $4.69
1
Add To Cart

SENSOR, Distributor (also Knock Sensor)
12636736
SENSOR, KNOCK(SERVICES 12692505)(USE TOGETHER WITH MATING CONNECT 19301207)(2WAY FEMALE)
Fitting Vehicle Options: KJ,KL,KM(LGW), KH,KJ,KL,KM(LGX)
Require Quantity: 02
Package Quantity: 1
Replaced By: 12729597
$35.50 $18.82
1
Add To Cart
12646781
SENSOR, CRANKSHAFT POSITION(INCLUDES 45)(W/SEAL)(MATING CONNECT USE 19299690)
- Fitting Vehicle Options: KJ,KL,KM(LGW)
$25.90 $13.73
1
Add To Cart
12646781
SENSOR, CRANKSHAFT POSITION(INCLUDES 44)(W/SEAL)(MATING CONNECT USE 19299690)
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$25.90 $13.73
1
Add To Cart

PIN, Engine Clutch Housing or Transmission
12597210
PIN, TRANS LOCATING
Fitting Vehicle Options: KJ,KL,KM(LGW), KH,KJ,KL,KM(LGX,M5N)
Require Quantity: 02
Package Quantity: 1
$7.41 $4.69
1
Add To Cart
90343317
PIN, TRANS LOCATING(M10X20)(4.104)
- Fitting Vehicle Options: KH,KJ69(LTG,M5N)
- Require Quantity: 02
- Package Quantity: 1
$7.39 $4.69
1
Add To Cart

BEARING KIT, Engine Crankshaft Main
12668646
BEARING KIT, CRANKSHAFT THRUST(INCLUDES 162-164)(W/O RED POLYMER COATING)
Fitting Vehicle Options: KH,KJ(LTG)
$44.53 $26.90
1
Add To Cart
12680650
BEARING KIT, CRANKSHAFT(INCLUDES 25,36,37)
- Fitting Vehicle Options: KJ,KL,KM(LGW,M5X), KH,KJ,KL,KM(LGX)
$51.45 $31.09
1
Add To Cart

12591866
SEAL, Engine Rear Main Bearing, SEAL,CRANKSHAFT REAR OIL
$36.43 $14.65
1
Add To Cart

BEARING KIT, Engine Connecting Rod
12668645
BEARING KIT, CONNECT ROD(CONTAINS PARTS FOR 4 RODS)
Fitting Vehicle Options: KH,KJ(LTG)
$18.65 $11.85
1
Add To Cart
12672032
BEARING KIT, CONNECT ROD(PART OF 7)
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
- Require Quantity: 06
- Package Quantity: 1
$11.08 $6.70
1
Add To Cart
12672411
BEARING KIT, CONNECT ROD(PART OF 7)
- Fitting Vehicle Options: KJ,KL,KM(LGW,M5X)
- Require Quantity: 06
- Package Quantity: 1
$4.74 $3.01
1
Add To Cart

11609577
BOLT, Engine Oil Pump, BOLT,OIL PUMP(M6X1X55,18 THREAD)(14.2 OUTSIDE DIAMETER,8.8,GMW3359,M POINT)(*KIT1)(0.659)
- Require Quantity: 07
- Package Quantity: 1
$5.10 $3.24
1
Add To Cart

12570326
PIN, Engine Cylinder Head, PIN,CYL HEAD LOCATING
- Require Quantity: 02
- Package Quantity: 1
$7.39 $4.46
1
Add To Cart

24424855
KEY, Engine Crankshaft/TIming Gear, KEY,CRANKSHAFT SPROCKET
$7.77 $4.94
1
Add To Cart

12626983
CHAIN, Engine Crankshaft And Camshaft Balancer, CHAIN,BALANCE
$52.95 $31.99
1
Add To Cart

12626984
TENSIONER, Engine Crankshaft And Camshaft Balancer, TENSIONER,BALANCE CHAIN(INCLUDES 140)
$45.02 $27.20
1
Add To Cart

12627108
SPROCKET, Engine Crankshaft/Timing, SPROCKET,CRANKSHAFT
$48.62 $29.36
1
Add To Cart

12655471
GUIDE, Engine Crankshaft And Camshaft Balancer, GUIDE,BALANCER CHAIN(INCLUDES 142)
$14.85 $9.43
1
Add To Cart

12655716
SPROCKET, Engine Crankshaft And Camshaft Balancer, SPROCKET,BALANCER SHAFT DRIVEN
$31.95 $19.30
1
Add To Cart

12674460
PUMP, Engine Oil Pump, PUMP,OIL(*KIT1)
$182.78 $105.02
1
Add To Cart

PLUG, Engine Block
11546668
PLUG, ENGINE BLOCK CORE HOLE(M18X1.5X15 LONG)
Replaced By: 11602946
$4.10 $2.61
1
Add To Cart
11546667
PLUG, ENGINE BLOCK CORE HOLE(M16X1.5X16.25)
- Require Quantity: 02
- Package Quantity: 1
$7.03 $4.46
1
Add To Cart

PLUG, Engine Oil Distribution
11588949
PLUG, M16X1.5X14, 24 OUTSIDE DIAMETER, SAE 1010 STEEL, GMW3044, W/ ALUMINUM WASHER(ENGINE BLOCK OIL GALLERY)(8.973)
Require Quantity: 05
Package Quantity: 1
$14.20 $8.58
1
Add To Cart
11546667
PLUG, ENGINE BLOCK OIL GALLERY(M16X1.5X16.25)(0.034)
- Fitting Vehicle Options: KJ,KL,KM(LGW)
- Require Quantity: 02
- Package Quantity: 1
$7.03 $4.46
1
Add To Cart
11546667
PLUG, ENGINE BLOCK OIL GALLERY(M16X1.5X16.25)(0.034)
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
- Require Quantity: 04
- Package Quantity: 1
$7.03 $4.46
1
Add To Cart
11588547
PLUG, ENGINE BLOCK OIL GALLERY(M12X1.75X16.5)(20.5OD)(W/SEALANT)(0.253)
- Fitting Vehicle Options: KH,KJ(LTG)
$8.72 $5.54
1
Add To Cart
12667078
PLUG, ENGINE BLOCK OIL GALLERY
- Fitting Vehicle Options: KJ,KL,KM(LGW)
$4.47 $2.84
1
Add To Cart
11602943
PLUG, ENGINE BLOCK OIL GALLERY(M12X1.75X14,6 INTAKE)(0.293)
- Fitting Vehicle Options: KJ,KL,KM(LGW), KH,KJ,KL,KM(LGX)
$4.54 $2.89

RETAINER, Engine Piston Pin
12569638
RETAINER, PISTON PINION(USED WITH FEDERAL MOGUL PISTONS)(*KIT3)
Fitting Vehicle Options: KH,KJ(LTG)
Require Quantity: 02
Package Quantity: 1
$7.02 $4.46
1
Add To Cart
12647160
RETAINER, PISTON PINION(*KIT3)
- Fitting Vehicle Options: KJ,KL,KM(LGW)
- Require Quantity: 06
- Package Quantity: 1
$7.32 $4.66
1
Add To Cart
12647160
RETAINER, PISTON PINION(*KIT2)
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
- Require Quantity: 06
- Package Quantity: 1
$7.32 $4.66
1
Add To Cart

12627113
NOZZLE, Engine Timing Gear Oil, NOZZLE,TIMING CHAIN OIL(INCLUDES 170)
$8.60 $5.46
1
Add To Cart

12631922
SHAFT, Engine Crankshaft And Camshaft Balancer, SHAFT,BALANCER W/OIL PUMP(INCLUDES 126-128,131-136,174-176)
- Replaced By: 25203088
$902.38 $568.37
1
Add To Cart

12645086
SEAL, Engine Oil Distribution, SEAL,PISTON OIL NOZZLE OIL PASSAGE (O RING)(PART OF 166)
$5.14 $3.27
1
Add To Cart

ROD, Engine Piston
12647161
ROD, CONNECT(INCLUDES 5,6,12)
Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
Require Quantity: 06
Package Quantity: 1
$65.00 $41.32
1
Add To Cart
12650266
ROD, CONNECT(INCLUDES 5,6,12)
- Fitting Vehicle Options: KJ,KL,KM(LGW)
- Require Quantity: 06
- Package Quantity: 1
$57.47 $36.53
1
Add To Cart
12674411
ROD, CONNECT(INCLUDES 112,113)
- Fitting Vehicle Options: KH,KJ(LTG)
$112.36 $64.56
1
Add To Cart

12677449
NOZZLE, Engine Oil Distribution, NOZZLE,PISTON OIL(INCLUDES 165,167)
- Require Quantity: 04
- Package Quantity: 1
- Replaced By: 25203326
$15.60 $9.91
1
Add To Cart

11546516
BOLT, Engine Crankshaft Pulley and Balancer, BOLT,CRANKSHAFT BALANCER
$10.01 $6.05
1
Add To Cart

BOLT, Engine Crankshaft Pulley And Balancer
11546516
BOLT, CRANKSHAFT BALANCER
Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$10.01 $6.05
1
Add To Cart
11611721
BOLT, BALANCE SHAFT SPROCKET(M10X1.5X35)(0.659)
- Fitting Vehicle Options: KH,KJ(LTG)
$7.03 $4.46
1
Add To Cart
12557840
BOLT, CRANKSHAFT BALANCER(M16X2.0X103)
- Fitting Vehicle Options: KH,KJ(LTG)
$9.21 $5.29
1
Add To Cart

BOLT, Engine Main Bearing Cap
11546618
BOLT, CRANKSHAFT BEARING CAP(M10X2X97)
Require Quantity: 08
Package Quantity: 1
$0.86 $0.55
1
Add To Cart
11611915
BOLT, CRANKSHAFT BEARING CAP(M8X1.25X90/M6X1X14)(STUD)
- Require Quantity: 08
- Package Quantity: 1
$0.78 $0.50
1
Add To Cart

11547603
BOLT, Engine Crankcase Ventilator, BOLT,PCV OIL SEPARATOR(M6X1X25)(1.079)
- Require Quantity: 07
- Package Quantity: 1
$11.81 $7.49
1
Add To Cart

11548520
NUT, Engine Crankshaft, NUT,CRANKSHAFT OIL DEFLECTOR
- Require Quantity: 08
- Package Quantity: 1
$4.20 $2.68
1
Add To Cart

11610697
BOLT, Engine Flywheel, BOLT,AUTOMATIC TRANSMISSION FLEXIBLE PLATE(M11X1.5X17)
- Require Quantity: 08
- Package Quantity: 1
$7.76 $4.93
1
Add To Cart

11610952
BOLT, Engine Crankshaft And Camshaft Balancer, BOLT,BALANCE CHAIN GUIDE(PART OF 159)(M6X1X34)
- Require Quantity: 02
- Package Quantity: 1
$4.60 $2.92
1
Add To Cart

CRANKSHAFT, Engine
12648349
CRANKSHAFT
Fitting Vehicle Options: KJ,KL,KM69(LGW,M5X)
$807.86 $508.94
1
Add To Cart
12699162
CRANKSHAFT
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$508.26 $321.71
1
Add To Cart
12626959
CRANKSHAFT, (INCLUDES 117,118)
- Fitting Vehicle Options: KH,KJ(LTG)

12627209
RING, Distributor (also Knock Sensor), RING,CRANKSHAFT POSITION SENSOR EXCITER INNER(PART OF 119)
$15.85 $9.93
1
Add To Cart

12646881
KEY, Engine Crankshaft Pulley And Balancer, KEY,CRANKSHAFT BALANCER
$4.21 $2.68
1
Add To Cart

12646881
KEY, Engine Crankshaft Pulley and Balancer, KEY,CRANKSHAFT BALANCER
$4.21 $2.68
1
Add To Cart

SEAL, Engine Crankcase

12649935
SEAL, PCV TUBE(PART OF 21)(PIP SEAL)(FLAT LONG)
$8.76 $5.56
1
Add To Cart
12650203
SEAL, PCV VALVE(UPPER)
$27.05 $16.35
1
Add To Cart
12650204
SEAL, PCV VALVE(LOWER)
$8.22 $5.23
1
Add To Cart

BALANCER, Engine Crankshaft And Camshaft Balancer
12652776
BALANCER, CRANKSHAFT
Fitting Vehicle Options: KJ,KL,KM(LGW,M5X)
$131.58 $82.51
1
Add To Cart
12700427
BALANCER, CRANKSHAFT
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
$109.22 $69.43
1
Add To Cart
25202078
BALANCER, CRANKSHAFT(ELECTRIC STEERING)
- Fitting Vehicle Options: KH,KJ,KL(LTG)
$102.43 $58.86
1
Add To Cart

12656680
PIN, Engine Oil Pan, PIN,LOWER CRANKCASE LOCATING(OUTSIDE DIAMETER 14, LEN 17)(DOWELL)(SAE 1215)
- Require Quantity: 04
- Package Quantity: 1
$18.96 $12.05
1
Add To Cart

12667200
SLEEVE, Engine Crankcase Ventilator, SLEEVE,PCV OIL SEPARATOR BOLT(8.75MM LONG)(1.430)
- Require Quantity: 07
- Package Quantity: 1
$4.26 $2.71
1
Add To Cart

SEPARATOR, Engine Crankcase
12668438
SEPARATOR, PCV OIL(USE TOGETHER WITH PCV HOSE 12679947)
Fitting Vehicle Options: KJ,KL,KM(LGW,M5X)(1ST DES)
Replaced By: 12692010
$95.70 $60.82
1
Add To Cart
12692009
SEPARATOR, PCV OIL
- Fitting Vehicle Options: KH,KJ,KL,KM(LGX)
- Replaced By: 12699265
$89.63 $56.98
1
Add To Cart
12692010
SEPARATOR, PCV OIL(USE TOGETHER WITH PCV HOSE 12681076)
- Fitting Vehicle Options: KJ,KL,KM(LGW,M5X)(2ND DES)
$95.70 $60.82
1
Add To Cart

12686890
PLATE, Engine Crankshaft, PLATE,AUTOMATIC TRANSMISSION FLEXIBLE(INCLUDES 122)
$96.09 $61.06
1
Add To Cart

12688011
PISTON, Engine Piston, PISTON,(W/PINION & COMPRESSION & OIL RING)(INCLUDES 8-11)
- Location: Driver Side
- Require Quantity: 03
- Package Quantity: 1
$128.04 $81.38
1
Add To Cart

12690013
HOUSING, Engine Rear Main Bearing, HOUSING,CRANKSHAFT REAR OIL SEAL(INCLUDES 22-24)
- Replaced By: 12715134
$112.05 $71.22
1
Add To Cart

12695285
HARNESS, Computer Control Sensors, HARNESS,ENGINE COOLANT TEMPERATURE SENS
$21.18 $13.46
1
Add To Cart

12695285
HARNESS, Engine Wiring, HARNESS,ENGINE WIRING HARNESS EXTENSION(3.682)
$21.18 $13.46
1
Add To Cart

55585169
BOLT, Distributor (also Knock Sensor), BOLT,CRANKSHAFT POSITION SENSOR RELUCTOR RING(PART OF 119)
- Require Quantity: 03
- Package Quantity: 1
$2.38 $1.51
1
Add To Cart

11588712
BOLT, HEX FLANGED HEAD,M6X1X20,17.5 THREAD,14.2 O.D.,8.8, GMW3359(PART OF 166)
- Require Quantity: 04
- Package Quantity: 10
$7.39 $4.69
10
Add To Cart

11588712
BOLT, HEX FLANGED HEAD,M6X1X20,17.5 THREAD,14.2 O.D.,8.8, GMW3359(PART OF 114)
- Require Quantity: 02
- Package Quantity: 10
$7.39 $4.69
10
Add To Cart

11588712
BOLT, HEX FLANGED HEAD,M6X1X20,17.5 THREAD,14.2 O.D.,8.8, GMW3359(PART OF 21)
- Require Quantity: 07
- Package Quantity: 10
$7.39 $4.69
10
Add To Cart

11589000
BOLT, HEX FLANGED HEAD,M8X1.25X50, 24 THREAD, 18 OUTSIDE DIAMETER, 10.9, GMW3359, RED BODY, W/ADH(BALANCE SHAFT BEARING)(*KIT1)
- Require Quantity: 08
- Package Quantity: 1
$7.39 $4.69
1
Add To Cart

11589000
BOLT, HEX FLANGED HEAD,M8X1.25X50, 24 THREAD, 18 OUTSIDE DIAMETER, 10.9, GMW3359, RED BODY, W/ADH(CRANKSHAFT BEARING CAP)
- Require Quantity: 06
- Package Quantity: 1
$7.39 $4.69
1
Add To Cart

11609410
BOLT, HEX FLANGED HEAD,M8X1.25X25,10.9,GMW3179(CRANKSHAFT BEARING CAP)(0.056)
$7.81 $4.96
1
Add To Cart

11609410
BOLT, HEX FLANGED HEAD,M8X1.25X25,10.9,GMW3179(CRANKSHAFT BEARING CAP)(0.056)
- Require Quantity: 02
- Package Quantity: 1
$7.81 $4.96
1
Add To Cart

11588715
BOLT, HEX FLANGED HEAD,M6X1X35,18 THREAD,14.2 OUTSIDE DIAMETER,8.8,GMW3359,5MM M POINT(PART OF 139)
- Require Quantity: 02
- Package Quantity: 1
$7.28 $4.69
1
Add To Cart

11609602
BOLT, HEX FLANGED HEAD,M10X1.5X89.9,28.35 THREAD,22.3 OUTSIDE DIAMETER,10.9,GMW3359,REDUCED BODY.(BALANCE SHAFT HOUSING)(*KIT1)
- Require Quantity: 08
- Package Quantity: 1
- Replaced By: 11546413
$11.79 $7.49
1
Add To Cart

9427693
PLUG, CUP 5/8, CORROSION RESISTANT STEEL(ENGINE BLOCK OIL GALLERY)(1.531)
$7.20 $4.57
1
Add To Cart

9427693
PLUG, CUP 5/8, CORROSION RESISTANT STEEL(ENGINE BLOCK OIL GALLERY)(1.531)
- Require Quantity: 02
- Package Quantity: 1
$7.20 $4.57
1
Add To Cart

11588713
BOLT, HEX FLANGED HEAD M6X1X25,21.5 THREAD,14.2 OUTSIDE DIAMETER,8.8,7114M,MACHINE,HEADER POINT(CRANKSHAFT POSITION SENSOR)
$6.19 $4.78
1
Add To Cart

11561256
BOLT, HEX FLANGED HEAD, M8X1.25X39, 29 THREAD, 18 OUTSIDE DIAMETER, 9.8 STEEL, GMW3359, MAT POINT(KNOCK SENSOR)

Genuine GM Parts, the Right Choice

GMPartsGiant.com offers the wholesale prices for genuine 2016 Cadillac CT6 parts. Parts like Engine Assembly-Cylinder Block & Internal Parts are shipped directly from authorized GM dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0L, 6 Cyl 3.0L, 6 Cyl 3.6L. Model Code: 4 DOOR SEDAN, BASE 4 DOOR SEDAN, PLATINUM 4 DOOR SEDAN, PREMIUM 4 DOOR SEDAN.