GM has announced the recall of 4,296 Chevrolet Sonics sold in the United States because of a potential problem with brake pads. Company officials said they expect only a few of the vehicles to have defective brake pads, the Detroit Free Press reported. GM decided on the recall after a Sonic was found to have a missing pad during routine service. There have been no reports of crashes, deaths or injuries, the company said. The recall involves 2012 Sonics produced at the Orion, Mich., assembly plant between June 2 and Nov. 21, the National Highway Transportation Safety Administration said on its Web site.