The product is a Chilton repair and tune-up guide for Chevrolet and GMC vans manufactured between 1967 and 1986. Published by Chilton in 1987, this paper media manual (Part #6930) provides detailed instructions and information for servicing and maintaining these vehicles. The guide is designed to assist owners and mechanics in performing repairs and tuning tasks on Chevrolet and GMC vans from the specified years, offering valuable insights and guidance for maintaining the vehicles in optimal condition.