MIAMI — Two decades after unveiling the 2003 Cadillac CTS-V and nearly a quarter-century since jumping into the SUV pool, Cadillac has brought high performance capability to its signature Escalade. The result is a full-size work horse with the DNA of a 1960s-era muscle car. It is capable of towing up to of 7,000 pounds, and its spacious interior has a cargo capacity of 121 cubic feet behind the first row, 72.9 behind the second, and 25.5 with all three rows in place.