Recently, we learned that the 2020 GMC Sierra 1500 diesel had earned an EPA rating of 23/30/26 mpg (city/highway/combined). Granted, that figure drops a bit if you choose the 4×4 version, but still. It seems like only yesterday that we were cheering midsize pickup trucks for finally cresting 30 mpg highway. The fact that a full-size pickup truck is already just as efficient is genuinely impressive.
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https://www.motorbiscuit.com/2020-gmc-sierra-1500-diesel-drives-like-a-normal-truck/