Said It Crushed Every 4.5L Duramax V8 Prototype. One Is in Sweden

GM's ambitious 4.5-liter turbodiesel V8, nicknamed the Baby Duramax, was almost ready to redefine the half-ton segment. The LMK prototype was shown in a Suburban as a concept at a SEMA show, signaling a torque‑rich, fuel‑efficient alternative to the era's diesel options. Then the 2008 financial crisis and GM's bankruptcy redirected priorities, and the project was shelved. GM later said the prototypes were crushed, but at least one LMK engine apparently survived and is now in Sweden, prompting questions about how many units still exist. The Drivecast explores what the engine could have been, comparing it to contemporaries and highlighting a "what might have been" moment in GM's powertrain history.