"GM's U.S. sales rose just 4 percent in the first half of the year, lagging the 15-percent gain for the industry. The growth is paltry compared with increases of more than 30 percent at brands like Volkswagen and Chrysler. Sales at two GM brands, Cadillac and Buick, have fallen, and GM's share of the U.S. market has dropped almost two points in the past year to 18.1 percent."
"'Nothing from a pure advertising point of view popped,' says Larry Dominique, Executive Vice President of the TrueCar.com auto pricing site and a former Nissan product planning executive."
"GM's July sales, due out Wednesday, are expected to be stagnant. And analysts predict its second-quarter earnings will show a decline when they're announced on Thursday."