It started with a 305 cubic inch displacement and was offered in ... rods remained the same across each variant of the GMC ...

But GMC made a big-block V6 that certainly earned the large-and-in-charge designation without needing eight cylinders. The 478 name refers to the engine's cubic inches — 478 of em'. That's 7.8 ...

General Motors has released more information on the 4.3-liter V6 available in the 2014 GMC Sierra.The engine will serve up 285 horsepower and 305 pound-feet of torque, with a six-speed automatic ...