While driving on Highway 360 in Arlington, TX, the engine appeared to not change gears. It was between 3:30 to 4:00 PM, moderate traffic. I left HWY 360 and used the side lane. Later, the engine light came on. I checked the fluid levels and all were fine. This vehicle was last serviced in December 2022. The problem is unknown.

- Cedar Hill, TX, USA

Driving and heard loud pop and shudder. Heavy vibration at highway speeds making vehicle unsafe to drive and vehicle also shuddered and acted like it was going to die when turning. Took to dealer and dealer discovered broken engine mounts. This is a known issue from GM. TSB 17-NA-166. GM certified service refused once to look at the engine mounts while vehicle was under warranty and had me continue to drive it until warranty had expired.

- Murray, KY, USA

Vehicle is affected by steering and breaks the car jurks

- Montebello, CA, USA

Severe bucking and or surging when switching gears. Has actually surged when at a full stop.

- Dracut, MA, USA

Hard shifting, shaking, jerking, hesitating shuddering

- Aventura, FL, USA

It has happened several times, while driving in a parking lot at 10 mph while making a turn the engine shut off, lost steering and brakes and the stabilitrak warning light came on... the engine restarted in about 5 seconds... I contacted Cadillac main office lawanda 855-880-1400 ex 5911833 and sent a email to mary barra CEO... they gave me a case #[xxx] they are aware of the problem and recalled over one million vehicle but my VIN number has not been added yet.. they will not fix it till GM adds my VIN to the national recall #18289... I was told off the record that money trumps consumer safety....they are making us pickup the car with the knowledge by us driving the car could kill someone if we loose steering and brakes while driving... parts of this document have been redacted to protect personally identifiable information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Boca Raton, FL, USA

Engine ceased running at 55 mph. Chain of failures- engine valve stem fractured (cylinder # 2), valve dropped into cylinder, piston struck valve, valve deformed to cylinder head, engine ceased properly detonate fuel completely, multiple codes, engine shut off. No advanced signal given to driver, no alarms when engine shut off. Power steering and power brakes ceased to work while driving in 55 mph zone, on a turn coming to a red light. Extremely dangerous for 5 occupants. Failure as shown in pictures below of the valve component are related to a material imperfection. The natural of this failure during the metal forming process was not detected for this component and will exist within other components within my vehicle or other vehicles. Once the problem is identified and corrected, engines of the effected vehicles will have to be replaced to avoid this safety issue, as it leads to potential death.

- Kalamazoo, MI, USA

Brake and gas pedals moved on their own without being commanded. Happened several times, vehicle not moving at the time. Took to the dealer and they observed it. Could not find the problem, sent me away. Happened again and dealer ordered a sensor to be installed when it comes in.

- Old Tappan, NJ, USA