For years General Motors fought a rearguard action, asserting that its relatively big cam-in-block engines were at least as good as the “high tech” DOHC mills offered by “the Japanese.” Led by the buff books, freethinking pistonheads knew better. More power from a smaller displacement engine clearly indicated higher intelligence. Honda, smartest of all, extracted 270 horsepower from a 3.0-liter V6. The 1990 Corvette made do with 245 horsepower from a 5.7-liter V8. Two decades later, GM finally developed a 3.0-liter V6 with an NSX-like output, and without the Acura’s pricey titanium innards or need for premium fuel. The new engine took the place of a previous-generation 3.6. My response after sampling the then-new V6 in the similarly new GMC Terrain: “Perhaps the 3.6 will at least find its way into a future Denali variant?” Three years later, the future has arrived.