Home » Video Shows Cadillac CT6-V 4.2L Blackwing V8 In Need Of Replacement

Video Shows Cadillac CT6-V 4.2L Blackwing V8 In Need Of Replacement

Video Shows Cadillac CT6-V 4.2L Blackwing V8 In Need Of Replacement

The twin-turbo 4.2L V8 (engine code LTA) found in the Cadillac CT6-V is one of the most advanced, tech-forward powerplants the brand has ever offered. However, despite all its impressive engineering and hand-built craftsmanship, it looks like the Blackwing V8 in this particular CT6-V failed with less than 2,000 miles on the clock.

The news comes from a viral post made by TikTok user @daddyoftwo__, who shot a quick snippet of the twin-turbo Blackwing V8 on the floor of a shop, with his Cadillac CT6-V hovering above on a lift. The engine, transmission, subframe, and front suspension have all been removed.

“Not even 2,000 miles on this hundred-thousand dollar car, CT6-V limited edition,” the user narrates. “Needs a new engine.”

@daddyoftwo__##mechanical ##mechaniclink ##mechanic ##gm ##cadillac ##ct6 ##ct6v ##gmproblems ##cadillacproblems ##dealershiplife ##dealership ##v8 ##twinturbo ##turbo ##junk♬ original sound – daddyoftwo__

Understandably, the user sounds pretty disappointed that his high-dollar luxury sports sedan already needs a major repair. Details on what happened and why the engine needs replacement were not provided.

Blackwing V8 in the Cadillac CT6-V

Blackwing V8 in the Cadillac CT6-V

Nevertheless, Cadillac seems quite proud of the engine. As we covered previously, the automaker recently sent out 3D-printed Blackwing engine models to Cadillac CT6-V customers as a small thank you gift.

Although it was developed with high hopes to take on the DOHC V8s of rivals from Audi, BMW, and Lexus, the twin-turbo 4.2L V8 Blackwing engine was limited in application to just two models, namely the Cadillac CT6-V and the Cadillac CT6 Platinum. Output is rated at 550 horsepower and 640 pound-feet of torque in the former, and 500 horsepower and 574 pound-feet of torque in the latter.

The engine will not be used in any other Cadillac products going forward – even the forthcoming Cadillac CT4-V Blackwing and Cadillac CT5-V Blackwing. The CT4-V Blackwing will be equipped with the twin-turbocharged 3.6L V6  (engine code LF4), while the Cadillac CT5-V Blackwing will be equipped with the supercharged 6.2L V8 (engine code LT4).

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This post was created in collaboration with our sister site, GM Authority.

Written by
Jonathan is an automotive journalist based out of Southern California. He loves anything and everything on four wheels.


  1. Too bad for the owner. Just hope it is just this engine and the Blackwing in general is trouble-free w/o defects.

    • If the engine goes bad I would be happy with the 6.2 supercharged Corvette motor in it as a replacement mine only went in 1/8 mile 90 miles an hour I must not have the big horse for or else they turned it down to lower horsepower it should have pulled better than that

  2. If it’s the guy I met by chance from west Chicagoland driving a CT6 loaner, he didn’t seem too concerned. Called it a “Blackhawk” motor. Slip of the tongue, or maybe not a car guy and bought the V as a status symbol?

  3. Interesting. I purchased a 2019 CT6-V in January 2020. With about 2200 miles on it, I received a message on the gauge screen – “Power is reduced” it was accompanied with a power reduction. Happened several times. Took it in and was told the ECM (main computer) was bad and needed to be replaced. Requires removal to and including the intake manifold. When that was done it read a failure of the water pump for the turbos. That had to be ordered and replaced. Without the car 7 days. Once replaced no more problems. Disappointed but still love the car.

  4. First of all, to my knowledge, there is no CT6-V “Special Edition”….Secondly, there is no mention of how he used the car, how it was driven. I have not heard of any other instances where this has happened……


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