The dollar index was off 0.40 to 89.10, despite some late short covering that brought the index up from its 88.82 low.
GM denied rumors that it was filing for bankruptcy, following news that the Securities and Exchange Commission is probing GM pension accounting practices in its dealings with Delphi. The greenback has been restrained this week, as investors make their bets on possible interest rate hikes and wait for more information about Ben Bernanke's inflation policies. Tension surrounding the Central Intelligence Agency leak probe in Washington was also weighing on the greenback.
The euro rose to $1.2141 from $1.2134 earlier Thursday. The dollar climbed to 115.45 yen from an earlier 115.30 yen.