The part interchange manual can be used to look up NOS part numbers. It includes approximately 3000 parts descriptions with factory part numbers by make model and year for Buick, Chevrolet, Pontiac, and Oldsmobile parts by year, make, and model that are interchangeable. For example, you can also determine if different years of Pontiac used the same part or as a parts manual for your car. Covers engine parts, body parts, electrical parts, suspension parts, clutches, transmission, rear ends, steering, and more. There are even some parts listed for the early 1930's. For convenience the parts are listed in sequence by group number. Model application or interchangeable parts for each car line is shown under the respective columns. Anyone looking for or selling parts, attending swap meets or restoring an antique auto will be able to put this information to good use.