Utilize the input text as a context reference, choose the right relationship between GMC and truck 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.

The ongoing success of the Chevrolet Silverado and GMC Sierra helped drive the ATP increase; full-size pickup truck ATPs were up $230 month over month and more than $1,000 year over year.

Answer: product_or_material_produced