INCIDENT: I was driving on the highway when I heard a strange "whistling noise." Thinking the noise originated from an old van in front of me, I passed it. The noise grew louder; the vehicle slowed very suddenly and, I pulled to the side of the road. The "low oil pressure" light came on just as the engine entirely blew. There were NO OTHER WARNING LAMPS, MESSAGES or OTHER SYMPTOMS. On-Star did not send roadside assistance for six hours and the battery died from extended use of the emergency lights. DANGERS: Experiencing catastrophic engine failure while driving on a highway presents obvious dangers as does sitting roadside for six hours (with a dead battery and no emergency flashers). INSPECTION: The G.M. Dealer (manufacturer representative) inspected the engine and confirmed that it was a catastrophic engine failure, requiring a new engine. The issue was also reported directly to G.M. The engine core, if need of further inspection, is likely either at the dealer, G.M., or a GM remanufacturing facility.

- Monticello, WI, USA

Friday 03/03/2023 Off hwy 34 was on i25 for about 5 minutes going 75 I accelerated to 80, to get in my right lane and out of the fast lane got over and a pop up came on my dash board, said press start. I then realized my car lost power on the interstate with cars going 75-80+ mph and I had no way of starting or pulling off the side of the road, as there was construction and temporary road w/ barricades on both sides. My car was stopped in highway traffic, I was pumping my brakes to notify the semi behind me that something was wrong so he wouldn-??t hit me. How is a 2023 vehicle going to stop on the highway with evening traffic, no where to pull over and hope I don-??t get in an accident, it was dangerous and there was no notifications on the dashboard telling me what was wrong. My fuel was full, battery was fine and oil life was good. There could have been several fatalities as it was on the interstate and I was in the right lane with moving traffic in both. Approximately 6:50pm. I do have photos and video of the incident. I hit the onstar button, was holding for several minutes, it disconnected, so I hit the SOS emergency button and the operator took my info including my location on I-25 near mile marker 255 prior to the exit near the park n ride. She advised she was sending cdot to get traffic controlled, traffic in the left lane was still moving fast, people were honking and going around the semi. My sister was in her Cadillac in front of me stopped with her hazards so traffic behind could see the hazards. Cdot arrived about 15 minutes later, and then followed by a State Patrol officer. He advised ME TO GET IN MY SISTERS VEHICLE, and go to the park n ride at exit 255 and the tow truck and office would meet me there.

- Eaton, CO, USA