Investing.com -- General Motors (NYSE: GM) shares fell 1.49% Tuesday despite posting first quarter results that exceeded Wall Street expectations across all key metrics and raising its full-year guidance.

The automaker reported adjusted EBIT of $4.3 billion, representing a 9.7% margin, well above analyst estimates of $3.0 billion. The beat was driven by stronger operational performance at GM North America, foreign exchange tailwinds, and a favorable adjustment of approximately $500 million related to a U.S. Supreme Court ruling on IEEPA tariffs.

GM raised its adjusted EBIT guidance to $13.5-15.5 billion from $13.0-15.0 billion, with the increase entirely attributed to the tariff-related benefit. The company maintained its adjusted automotive free cash flow guidance at $9.0-11.0 billion, noting uncertainty around the timing of the IEEPA cash refund.

The company indicated that strong operating outperformance in the first quarter is expected to offset increased commodity and freight cost headwinds, which have risen to $1.5-2.0 billion for the year from a prior estimate of $1.0-1.5 billion.

GM repurchased $800 million of stock during the quarter, with $5.5 billion remaining on its authorization.

"We expect a positive stock reaction today to the strong underlying operating performance," analysts at Wolfe commented.