General Motors will begin importing the Cadillac CT6 plug-in hybrid from China, after the gasoline engine CT6 goes on sale later this year. Conventional versions of the CT6 will be built alongside the plug-in hybrid Cadillac ELR, Chevrolet Impala, Chevrolet Volt and Buick LaCrosse at GM’s Detroit-Hamtramck Assembly Plant in Michigan. But with higher sales of the […]