GM is matching or beating discounts from rivals Ford and Chrysler this month. It miscalculated in November when it reduced incentives and truck buyers went looking elsewhere for sweeter deals.

The three Detroit automakers have been vying for new truck business all year as the market continues a slow rebound from the Great Recession. Experts say buyers can now get discounts of $4,500 or more on some of the best-selling vehicles in the country. Throw in low interest rates, sweet lease deals and abundant financing and it’s a good time for people who are in the market for a truck.

GM is offering up to $9,000 off remaining 2012 models pickups and close to $4,500 off 2013s, while the other automakers have either held steady or raised incentives on certain models. Dealers say Chrysler’s average incentive is around $5,000, while Ford’s is less, around $4,000.

That means good deals on Ford’s F-Series pickup, the top-selling vehicle in America, as well as the Silverado, which ranks second. Together, the Detroit Three control 83 percent of the U.S. full-size pickup truck market.