Chevy already has five crossovers and SUVs in its lineup, ranging from the wee little Trax up through the Equinox, Traverse, and Tahoe to the stupefyingly large Suburban. General Motors will rightly brag about how the Tahoe and ’Burban dominate their markets, the Equinox and Traverse are gaining market share, and that the Trax does something or other. The new two-row “Blazer” slots into the narrow space between the Equinox and Traverse, one never before recognized by Chevy. Call it the mid-mid-size, mid-midrange crossover segment. Or call it Chevy’s version of the GMC Acadia. Your choice.