Decoding General Motors Body Style Designations

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 them. The alphabetic codes used were always single letters and way back in 1946 GM began using a standard set of body style codes consisting of just the four letters A, B, C and D. Four different letter designations were all that was needed at the time because GM’s assortment of vehicles…