It’s an age old conundrum among pickup truck owners: tailgate up or down?

We’re talking aerodynamics and fuel economy here, but without personal access to wind tunnels, the evidence most owners have to support their position is anecdotal, at best.

Many split the difference between form and functionality and replace the tailgate with an open net that lets the air through, but not their cargo.


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 Tailgate Up Or Down? GM Tries to Answer Age-Old Pickup Truck Mystery

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