The contact owns a 2021 Cadillac Escalade. The contact stated while driving 70 mph, the contact heard an abnormal rattling sound and then saw smoke coming from under the hood. Other drivers were honking at the contact and alerted him that there was oil leaking from the rear of the vehicle. There was no warning lights illuminated. The contact was able to pull over and had the vehicle towed to the dealer. The dealer diagnosed that the axle rod had detached causing an engine failure. The vehicle was not repaired and remained at the dealer. The dealer was awaiting a new replacement engine. The manufacturer was not made aware of the failure. The failure mileage was 2,000. Vin was not available.