For about a week my engine seemed to be bogging down. I thought maybe it was bad gas purchased that week . I was traveling on [XXX] in Ky a day later as I do everyday . My state speed limit is 70 mph, suddenly my car was bucking and felt like the engine was going to stall and speed immediately went from 70mph to 20 and a huge plume of white smoke came out of the tailpipe and check engine light came on . I was terrified I could have been killed or killed somebody else. I was able to get the car to my mechanic who diagnosed it as cylinder 4 complete fail this vehichle has AFM ( active fuel management ) lifters get stuck , loss of power and engine failure. It cost me 11k for a new engine. And car rental for 1k . After doing research, I was able to find that some vehicles from 2014 to 21 including mine Cadillac GMC Chevrolet among many other vehicles with AFM active fuel management had issues GM knew about this failure and that they engines were defective during production and sold the vehicles anyways upon further investigation because GM was aware of this They were offering to replace the vehicle if it was under warranty or the engine several states Atlanta in California have lemon laws for this. Unfortunately my state ds not when I call GM to request a refund since they were aware that the engines should not have been sold while they were defective. They told me because I took it to my mechanic it was out of their hands. There was nothing they can do. . This is not acceptable. They have put consumers lives at risk knowing these engines were defective and decided to sell them anyways I want to know why there was not a lemon law at the beginning and how do I go about getting my money back for the cost of this engine.. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)