GM publicly pulled the wraps off its Riviera concept car in Shanghai, releasing an avalanche of photos, sketches, and renderings, as well. The Riv was designed at the General’s China-based Pan Asia Technical Automotive Center (PATAC), and according to design honcho Ed Welburn, it is a rolling showcase of design themes that we should be seeing on the next generation of midsized Buick sedans. Continue reading Shanghai Auto Show: Buick Riviera Concept officially unveiled