Driving with children on freeway after picking them up from school and suddenly the vehicle shut down completely nothing on dash neither. In the middle of freeway after doing 55 miles per hour was very scary for me and my family. Tried starting vehicle and would not start for 15 minutes. The next day took it to the dealer where I purchased it and was told it was 5 vehicles there before me that needed engine replacement and I might be the sixth. I was called the next day and was Told the service man took it for a spin and the engine completely seized on him and to find out it was the engine And other components. There were no warning before any of this happened it seems as if once you accelerate to about 50 to 60 mph it completely shuts down he said. My vehicle is currently at the Jim Riehl Cadillac in Clinton Twp Michigan and waiting for an engine to be replaced with other components I was told. [XXX] was the date of the occurrence and I was told also told they may need to keep my vehicle for 2 — 3 months for the replacement from the GM manufacture. I spoke to individuals at the Cadillac headquarters and everyone seems to act as if this is so brand new and not a huge issue and Im the one that is paying these hefty monthly car notes on a vehicle that I only owned for 1 year and 6 months with 24,000 miles on it currently. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)