(ACDelco is a house brand of GM, similar to Chrysler's Mopar or Ford's Motorcraft.)

The auto companies are an interesting example, because all of the major manufacturers have subsidiary organizations which exist just for parts manufacture, and all of them handle parts manufacturing and distribution for far longer than the original manufacturing run. While GM might only make a particular model car for a few years, ACDelco might continue to make consumable parts for it for decades, based on demand.