General Motors net profit fell 4.5% in 2020, but a strong second half more than offset the effects of pandemic-related factory closures and a costly air bag recall. (AP Photo/Richard Drew, File)DETROIT – General Motors' profit fell 4.5% in 2020, but a strong second half more than offset the effects of pandemic-related factory closures and a costly air bag recall. GM predicted the shortage will cost it $1.5 billion to $2 billion in earnings before taxes this year due to lost production. Still, GM expects pretax income for the year of $10 billion to $11 billion, or $4.50 to $5.25 per share. Of that, $6 billion would go to electric vehicles and $1 billion would go to autonomous, Chief Financial Officer Paul Jacobson said.