We just bought a 2016 Acadia Denali and it cheaper to insure than the Impala!! I don't understand why my Impala is so much money to insure. My only guess is my commute to work is 104 miles round trip. I would think that a run of the mill Impala would be cheap. Even my 2004 GTO, which is very expensive to fix, is cheaper. I think I am around $900 a half on 4 cars, full coverage on all, through Progressive. This is in rural Missouri. When I lived in NJ, I had MetLife through a work discount and I was being ass raped for $3000 a year, with full coverage on 2 and garage/summer coverage on the GTO. This is all with no tickets, accidents or claims.
As stated, your zip code, age, marital status, driving record, credit score, insurance score, vehicle types and usage and mileage counts will all dictate your price. I haven't priced car insurance in the last few months but when I last did, Progressive was still cheaper for me.