This book covers Chevrolet lt.duty truck models from 10 to 30 series from 1946 to 1972. Basically, these books have a few parts that carry over from 1946, but the bulk of the coverage is 1960-up, with decent coverage from '55 to '59. This was one of the books I used on a daily basis, and saved when we closed down the dealership I worked in. All 17 groups are covered, still in loose-leaf form. The final printing, in May of '79 was totally bound, and left out some of the info that is still in this book. A surprising amount of parts are still available new from GM, this book will help you find them !