V6 Engine Change Ignition Coils Specs Specifications

2016-2020 Cadillac CT6 Specifications

Look up Cadillac CT6 specification, engine oil capacity, spark plug gap, safety rating, fuel consumption, transmission, and light bulb sizes.

Engine 2.0L 4-Cylinder DOHC

  • Recommended oil viscosity: 5W-30
  • Oil certification: DEXOS-1
  • Oil capacity: 5.0 quarts

Spark Plug Gap

  • 2.0L 4-Cylinder: 0.036”

Engine 3.0L 6-Cylinder DOHC

  • Recommended oil viscosity: 5W-30
  • Oil certification: DEXOS-1
  • Oil capacity: 6.0 quarts

Spark Plug Gap

  • 3.0L 6-Cylinder: 0.031″

Engine 3.6L 6-Cylinder DOHC

  • Recommended oil viscosity: 0W-30
  • Oil certification: DEXOS-1
  • Oil capacity: 6.5 quarts

Spark Plug Gap

  • 3.6L 6-Cylinder:0.035”

Hydraulic Brake System

  • Type: DOT 3 Hydraulic Brake Fluid (GM Part No. 19299818, in Canada 19299819)

Windshield Washer

  • Type: Automotive windshield washer fluid that meets regional freeze protection requirements.

Automatic Transmission (w/3.6L LF3 Twin Turbo Engine)

  • Type: ATF-WS Automatic Transmission Fluid (GM Part No. 88863400, in Canada 88863401)

Automatic Transmission (Except w/ 3.6L LF3 Twin Turbo Engine)

  • Type: DEXRON ® -HP Automatic Transmission Fluid (GM Part No. 19300536, in Canada 19300537)

Transfer Case (All-Wheel Drive)

  • Type: Transfer Case Fluid (GM Part No. 88861950, in Canada 88861951)
  • Capacity: 0.8qt (0.8L)

Rear Axle (Non-Limited Slip Differential)

  • Type: SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88863089, in Canada 88863090) meeting GM Specification 9986285

Rear Axle (Limited-Slip Differential)

  • Type: SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88862624, in Canada 88862625) meeting GM Specification 9986290.
  • Capacity:  1.3 qt (1.2 L)

Rear Axle/Front Axle (All-Wheel Drive)

  • Type: SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88863089, in Canada 88863090) meeting GM Specification 9986285.

Hood Latch Assembly, Secondary Latch, Pivots, Spring Anchor, and Release Pawl

  • Type: Lubriplate Lubricant Aerosol (GM Part No. 89021668, in Canada 89021674) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.

Electronic Limited Slip Differential (eLSD) Clutch System Lubricant (CTS-V and V-Sport Only)

  • Type: DEXRON®-VI Automatic Transmission Fluid.

Key Lock Cylinders, Hood and Door Hinges

  • Type: Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in Canada 10953474).

Weatherstrip Conditioning

  • Type: Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or Dielectric Silicone Grease (GM Part No. 12345579, in Canada 10953481).

Cooling System– Engine

  • Type: 0/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant.
  • Capacity
    • 2.0L L4 Engine: 9.3 qt (8.8 L)



  • 2.0L LSY I4 (turbo gasoline)
  • 2.0L LTG I4 (turbo gasoline)
  • 2.0 L LNF I4 (turbo gasoline PHEV)
  • 3.6L LGX V6 (gasoline)
  • 3.0L LGW V6 (twin-turbo gasoline)
  • 4.2L LTA V8 (twin-turbo gasoline)


  • 8-speed Hydra-Matic 8L45 automatic
  • 8-speed Hydra-Matic 8L90 automatic
  • 10-speed Hydra-Matic 10L90 automatic
  • electronic CVT (CT6 PHEV)

Fuel Consumption

Cadillac CTS Fuel Comparison


  • Rushit Hila • ASE Certified

    Rushit Hila, an ASE-certified engineer (G1 Automotive Maintenance and Repair), brings over two decades of hands-on experience in the automotive world to his writing. With a strong educational background, including a Master of Science in Engineering and a Bachelor of Science in Engineering, he has honed his skills and expertise through years of practical work. As a respected authority in the field, Mr. Hila is dedicated to offering insightful and valuable content that resonates with both vehicle owners and mechanics.

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