Part of that high margin is because emissions and fuel economy laws are looser for truck-like vehicles, so they make everything a truck-like vehicle to avoid having to comply.
The difference in gas mileage between SUVs and sedans is pretty negligible these days. They're mostly just cars with a different body style. And for the most part they're just flat better which is why they've mostly supplanted cars in the market.
It's really trucks that have gotten stupidly big these days.
