Complex sentence: The second-generation TrailBlazer was unveiled as a concept at the 2011 Dubai Motor Show, and a production version for the 2012 model year was officially released at the Bangkok Motor Show 2012 on March 21,2012.
Split into simpler sentences: The second-generation TrailBlazer was unveiled at the 2011 Dubai Motor Show. The production version for the 2012 model year was officially released at the Bangkok Motor Show 2012 on March 21,2012.