Most of the stats I am reading show that truck and SUV sales dropped much more than car sales.

From 2006:

GM, the world’s largest automaker, said its sales fell 22.2 percent, with trucks falling 31.2 percent and cars inching down 2.7 percent.

At Ford, sales of Ford, Lincoln and Mercury vehicles fell 35.2 percent. Truck sales plummeted 44.8 percent, while cars slipped 6.7 percent. Sales of F-Series pickup trucks, long the country’s best-selling vehicle and the company’s most important vehicle, shot down 45.6 percent.

DaimlerChrysler’s Chrysler Group said its sales fell 37.4 percent, with truck sales off 40 percent and car sales off 23.5 percent. That change happened despite the fact that Chrysler, alone among automakers, has revived the employee price promotion that fueled sales last year.