Five of the top six automakers sold more cars and trucks in November than analysts expected, with a surging economy, heavy discounting and falling fuel prices luring consumers into U.S. showrooms.
General Motors on Tuesday said November sales rose 6.5 percent to 225,818 vehicles.
"Lower gasoline prices are helping the entire market, not just SUVs and trucks," said GM spokesman Jim Cain, adding that fuel prices "are just one factor among many that are helping boost sales industry-wide." He cited a stronger economy, improving consumer confidence, higher wages and lower unemployment.
Sales of GM's Chevrolet Silverado and GMC Sierra full-size pickups climbed 34 percent to 65,343. The big trucks accounted for 29 percent of GM's total sales volume in November.
Chrysler Group sales rose 20.1 percent to 170,839 vehicles on strong showings by its Jeep brand and Ram pickup trucks, the unit of Fiat Chrysler Automobiles NV said.
Chrysler's Ram pickup truck sales were up 21 percent, while Jeep SUV sales jumped 27 percent.
Ford Motor reported a slight decline in sales to 186,334, about what analysts had expected. Sales of the best-selling F-150 pickup were down 10 percent to 59,049 as the automaker began a changeover to the redesigned 2015 model.