K5—the mere mention of this model designation gets the attention of Chevy truck fans everywhere. The term "K5" was first applied to the first-generation 1969-1972 Chevy Blazer, in order to differentiate this short-wheelbase 4x4 from its C10 and C20 truck brethren. Fortunately for GM, the Blazer was a huge hit, continuing production as a full-size model for more than two decades. GM truck enthusiasts, classic truck fans, and off-roaders love the platform for its simple style and rugged durability.