By G. CHAMBERS WILLIAMS III San Antonio Express-News There's a new midsize pickup coming to market this fall from Suzuki. The automaker introduced three concept versions of its 2009 Equator truck at the Chicago auto show in February. It's the first pickup from Suzuki, known in the United States mostly for its motorcycles and small SUVs. The three concepts include the RMZ-4, which Suzuki said is designed for off-road enthusiasts; the Quad, aimed at "outdoor adventurers"; and the Quay, "for boating and water-sports aficionados." The concepts were designed to "showcase Suzuki's diverse brand...