DETROIT -- Chevrolet is offering a money-back guarantee on new cars and trucks in an effort to attract more customers.

The General Motors brand said Tuesday that buyers can get refunds if they return their 2012 or 2013 vehicles for any reason. The guarantee lasts for up to 60 days from the date of purchase.

Chevy Marketing Chief Chris Perry says research shows that customers like it when companies show confidence in their cars and trucks.

Customers have to pay a set price including incentives. If they aren't satisfied with the vehicle, GM will refund their money.

Returned vehicles can't have more than 4,000 miles on them and they can't be damaged.

The offer ends on Sept. 4.

Chevy also is offering no-haggle prices to clear out its 2012 models.