On November 21, General Motors announced it is recalling over 640,000 pickups worldwide because hot gas from a high-tech seat belt can set the carpeting on fire.The company has reported two fires, but no injuries.The recall covers certain 2019 and 2020 Chevrolet Silverado and GMC Sierra 1500 trucks, as well as some 2020 Silverado and Sierra 2500 and 3500 heavy-duty pickups. GM says it uses a sm...