Hey! Who slipped the “Jumbo-Gro” in the 2021 Chevrolet Tahoe’s gas tank? Having received a total overhaul for the current model year, the 2021 Chevrolet Tahoe RST is far larger than the vehicle it replaces. Its wheelbase is 4.9 inches longer than last year and overall, its 6.7 inches lengthier. It’s a massive 81 inches wide with the mirrors folded. Of course, this pays dividends inside, where the third row gets 10.1 more inches of legroom, the second row adds 3 inches, and the cargo hold swells by 10.2 cubic feet. The Tahoe is a member of General Motors’ full-size SUV lineup that includes the Chevrolet Suburban, GMC Yukon and Yukon XL, and Cadillac Escalade, which share the same underpinnings and intimidating slab-sided styling with enormous grilles. Derived from the Silverado/Sierra pickup platform, the Tahoe is America’s bestselling full-size SUV, one that outsells its GMC sibling as well as its crosstown rival, the Ford Expedition.