General Motors Co. is ceasing monthly vehicle sales reporting in favor of quarterly releases, breaking an auto industry tradition that has outlasted similar shifts in retailing, technology and other industries.

March car and truck sales, to be released Tuesday, will be the automaker’s final monthly report. Its first quarterly U.S. sales report would be issued in July and will be released separately from its quarterly financial reports to investors.

“Thirty days is not enough time to separate real sales trends from short-term fluctuations in a very dynamic, highly competitive market,” Kurt McNeil, GM’s U.S. vice president for sales operations, said in a statement. “Reporting sales quarterly better aligns with our business, and the quality of information will make it easier to see how the business is performing.”

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