2nd Place GMC Sierra 1500 AT4 3.0L Duramax
What’s New
ith a bit of engineering magic to fit the new powerplant under the hood, GM’s inline-six has finally met the Sierra 1500 AT4. The 3.0L Duramax diesel comes with a suite of tech including a lag-reducing variable-geometry turbocharger, a high- and low-pressure exhaust gas recirculation system to keep parasitic turbo boost losses (and emissions) to a minimum, a variable intake manifold, and active thermal management to keep the I-6 within its optimal temperature range.
