April 4 (Reuters) - Tesla Inc on Tuesday morning surpassed General Motors Co as the most valuable U.S. auto firm.

In late morning trade, Tesla had a market capitalization of $52.7 billion compared with $49.6 billion for GM.

Tesla on Monday said it delivered a record 25,000 electric vehicles in the first quarter. It plans to begin production this summer of the mass-market Model 3 sedan. (Reporting by Paul Lienert in Detroit; Editing by Chizu Nomiyama)