Efficient full-size SUVs are like cheap wagyu beef. They simply don’t exist. But when a punchy six-cylinder diesel engine is fitted under the hood, things change. The 2021 Chevrolet Suburban Diesel is rated at 20/26/22 mpg city/highway/combined, which makes it the most fuel-efficient four-wheel-drive full-size SUV in the market. Think about that for a sec. […]

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