What is the material of Buick Sail water tank in 2004?

Buick Sail's water tank in 2004 was made of aluminum. The aluminum water tank has high heat dissipation, while the automobile water tank has high action power, high water tank temperature and good heat dissipation performance, so the Buick Sail water tank in 2004 is made of aluminum. Buick is an automobile brand sold by General Motors in the United States, Canada and China. It is sold in North America, China, CIS countries and the Middle East.