will a 2016 chevy impala door fit in a 2009 chevy impala?

2006-20016 will interchange, but there are 2 types of doors with moulding and without moulding. These doors should be available at a u-pull-it salvage yard for $40.00 to $90.00. A "standard" yard will charge $100 to $250. Some will want more, but they aren't worth it. These doors are plentiful and you may be able to match your paint code, keep in mind cars painted on different days and in different years may not be a perfect match.