Adding to the mounting toll of its safety crisis, General Motors said on Friday that it was recalling more than half a million more vehicles, including full-size pickup trucks and sport utility vehicles that can suddenly switch into neutral.

General Motors’ total number of recalls for the year has now surpassed 20 million vehicles, and is nearing the 22 million recalled last year by all the automakers combined.

Almost all of G.M.’s recalls have come since the automaker began recalling 2.6 million older Chevrolet Cobalts and other small cars with a defective ignition switch that it has tied to at least 13 deaths and 54 crashes.

In addition to the rising number of recalls, the cost of the repairs is increasing as well; G.M. has set aside $2 billion for repairs through the second quarter, which ends on Monday. That figure does not include the recalls announced on Friday.