2021 Cadillac CT4

7 complaints on file, page 1 of 1.

1. Filed Jun 29, 2026Failure Jun 17, 2026Chatsworth, CAEngine, Fuel/propulsion system, Vehicle speed control

   While driving at highway speeds on the freeway in my 2021 Cadillac CT4-V, the vehicle experienced a sudden, catastrophic loss of propulsion. Without warning, the transmission dropped out of gear as if it were in neutral. I completely lost the ability to accelerate, creating an immediate, life-threatening hazard as I was left stranded and blocking high-speed freeway traffic. Only after the mechanical failure occurred did the check engine light illuminate. The vehicle was towed to Cadillac Dealership. The service department confirmed that the vehicle suffered from the known defective transmission control valve covered under GM Special Coverage Bulletin N242480631 and tied to NHTSA Campaign 25V148. The dealership ordered the replacement valve body but aborted the repair after confirming that the control valve's failure caused massive internal fluid leaks and total mechanical destruction of the transmission assembly. The manufacturer is currently denying coverage for the complete transmission replacement, despite the fact that the total failure was consequential damage directly caused by the federally recalled, component defect.

   NHTSA complaint 11747192
2. Filed May 31, 2026Failure May 1, 2026Pompano Beach, FLFuel/propulsion system

   Check engine light for P1467 on a 2021 CT4 V. This is for a "purge pump underspeed" issue. The issue is known on CT4 Cadillacs and has an active recall out: N242441120 Evaporative Emissions Purge Pump. This recall is only for the 2.0, LSY engines, but the much more uncommon 2.7, L3B engine in my car uses the same part # for the purge pump. It feels as though they are intentionally ignoring an equal emissions issue, but just on a smaller scale with the limited number of these engines they sold. What actions can I take?

   NHTSA complaint 11741180
3. Filed Aug 27, 2025Failure Jul 31, 2025Rockford, ILPower train

   There is a known issue with hesitation and hard shifting on my vehicle. According to the gm bulletin that was released I believe in may of 25 my year, make and model has a known issue where the transmission control valve may stick or wear causing jerking and shifting issues and could cause a possible crash. According to the bulletin by gm the fix is to replace the valve cover on the transmission. My vehicle is currently at the Cadillac repair center for this shifting issue and it has been diagnosed to need a valve cover replacement to solve the problem. My point is I have the exact problem listed in the recall and the exact repair listed on gm’s bulletin is the solution. Now I have to pay for the repair because my vin is not specifically listed yet but my year, make and model and problem and the solution is all listed . I know I’m apart of this recall please help me

   NHTSA complaint 11683316
4. Filed Apr 16, 2025Failure Nov 4, 2024Fishers, INEngine

   valve body failed and was supposedly repaired. I had the car 1 day and valve body failed again. My car has been in the shop since November 4, 2024 with no estimated time of repair because no parts are available. I was told they would replace the transmission. That has not happened yet. No parts available. My car has been disable for 6 months.

   NHTSA complaint 11655109
5. Filed Apr 30, 2024Failure Oct 6, 2023Griffin, GAEngine, Suspension

   Engine and transmission for the second time in 90 days apart. Supposedly be a new part. I don’t think so.

   NHTSA complaint 11586038
6. Filed Jan 24, 2024Failure Jan 22, 2024Bloomfield Hills, MIElectrical system, Warnings, Steering

   While driving the power steering was lost. The the auto hold function lit up. The collision warning light lit up. The stabilitrak system lit up. The air bag safety system lit up. Steering became very hard and made for y safe driving. Later that day 01-22-24, all warning light went out and power steering was normal.

   NHTSA complaint 11567425
7. Filed Jun 23, 2022Failure Jun 12, 2022Burton, MISidewall

   235 40 80 run flat Both front and rear passenger tires no damage to rim less that 10k miles

   NHTSA complaint 11470678