The Cadillac SRX is a luxury mid-size SUV manufactured by General Motors from 2004 to 2016. It is based on the GM Theta platform, which is shared with several other vehicles, including the Chevrolet Equinox. It is powered by either a 3.6-liter V6 engine or a 2.8-liter turbocharged V6, and is equipped with standard all-wheel drive. The Cadillac SRX was the best-selling luxury crossover in the United States for three years in a row (2009-2011).