2020 is the year of the diesel truck. In addition to all-new HD trucks from the big three, GM and RAM have finally launched their much awaited small diesels. GM’s new engine is the gem in the segment, an all-new inline six design that’s the only diesel in this bunch originally designed for use in a pickup truck? But does that make it the best engine and can that make the GMC Sierra the best small diesel truck? Let’s find out.
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