GM's sales totalled 223,437 cars and trucks. Three of its four brands saw double-digit gains; Cadillac sales were flat compared with last September.
Sales of the Chevrolet Silverado pickup rose 54 per cent to 50,176, while the GMC Sierra pickup was up 25 per cent to 16,763.
General Motors Co. fueled the sales with good deals. J.D. Power and Associates estimates GM spent just under $5,000 in incentives per pickup, which was 30 per cent, or $1,140, higher than a year ago.
GM's SUV sales were also strong. Cadillac Escalade sales more than doubled, while Chevrolet Traverse sales rose 45 per cent.