Truck-based models cost less for U.S. car markers to produce because they already have all the parts developed for their truck business. These truck-based SUVs have been the most profitable segment for Detroit in recent years, so developing new car-based models will eat into margins.
Detroit was an island surrounded by prosperity this year. The big SUV sales collapsed and did a number on their profitability. Both GM and Ford will lose a little market share in 2006, but not at the rate of 2005.
Detroit will slap on big incentives, and we'll be back to normal.