US big three auto makers post all sales increase in July, according to statistics released on Thursday, with GM up 16.3 percent, Ford and Chrysler up about 11 percent compared with the same month of last year.

General Motors Co. said it sold 234,071 vehicles in the US in July, 16.3 percent up year-on-year, driven by nearly 50 percent monthly sales increases for both the Chevrolet Silverado and GMC Sierra pickups. GM said full-size pickup sales were up 44 percent, the best July figure since 2007.

Meanwhile, Ford Motor Co. said its US sales of 193,715 vehicles in July jumped 11.4 percent, boosted by a 22.6 percent increase in Ford F-Series pickups. Chrysler Group LLC said its July sales of 140,102 vehicles rose 11 percent as it posted its best July in seven years.

"We continue to see strong retail sales, particularly with our pickup trucks and SUVs, and that has helped propel Chrysler Group to our 40th consecutive month of year-over-year sales growth," Reid Bigland, Chrysler's head of US sales, quoted by local media Detroit News as saying.