The new off-road-focused AT4 trim gives the new Yukon added visual panache — and helps out past the pavement, too.

What is it?

GMC’s full-size SUV, available for the first time in AT4 trim — the marque’s upscale off-road-focused sub-brand, meant to help boost sales and average transaction prices alike much the way the Denali sub-brand has done for GMC.
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