Decoding General Motors Body Style Designations

*Back by popular demand: This article is a re-post from May of 2013. It seems that some of our readers are confused by General Motors’ use of alphabetic codes to designate the many different GM vehicle “families,” so we thought it would be a good time to present this information once again. General Motors vehicles have long been produced on shared platforms with each platform or body type fitting into designated GM vehicle “families” that use alphabet letters to separate…