DETROIT—Stellantis is recalling more than 266,000 pickup trucks mainly in North America because the side air bags can explode without warning and hurl shrapnel into the cabin. It’s the second major recall of pickup trucks in the past two months for the same problem. Stellantis, formerly Fiat Chrysler, says the recall covers covers certain Ram 2500 and 3500 heavy duty pickups from the 2015 through 2020 model years. Also included are some previous generation Ram 1500 pickups known as the Classic, from 2015 through 2020. The latest version of the Ram 1500 is not affected. Stellantis says in a statement Friday that the air bag inflators in the pickups were contaminated with moisture during a supplier’s manufacturing process. Metal canisters holding the inflator can rupture, even if the air bags are not deployed in a crash. One inflator ruptured, but Stellantis says there have been no injuries. The company says …