General Motors has officially unveiled the company’s global 2012 Chevrolet Colorado in Thailand. The automaker says the truck is the culmination of a vehicle program that spanned five years, $2 billion and five continents. What did all that effort come up with? For starters, buyers in Thailand will be able to chose between a pair of new turbo-diesel four-cylinder Duramax engines. The engines are available in both 2.5-liter and 2.8-liter displacements, with the smaller lump producing 150 horsepower and 258 pound-feet of torque. Funk Flex Find Flex on Google+