1971 Chevrolet Dealer Technical Service Bulleting set numbered from 1-65. I'm guessing this is not a complete set, but, this is a guess on my part, all I have is what is included, 65 bulletins. Technical Service Bulletins were issued after the service manuals were printed and alerted dealer mechanics about new procedures, problems and repairs. Some of the topics include; Hub Cap Retention C & P Series 20 & 30 Series trucks; Poor Starter Engagement 1970-1971 V8 Engines with automatic trans; Engine Fan To Shroud Interference big cars, Drum Brake Noise 69-70-71 Chevelle and more.