Utilize the input text as a context reference, choose the right relationship between Ram pickup and Chrysler from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

DETROIT (AP) -- Fiat Chrysler must offer to buy back from customers more than 500,000 Ram pickup trucks in the biggest such action in U.S. history as part of a costly deal with safety regulators to settle legal problems in about two-dozen recalls.

Answer: manufacturer