GM said it sees a route to compromise on tailpipe-emissions rules. Drivers navigated the freeway in Los Angeles in April. DETROIT—General Motors Co. will no longer back the Trump administration in its legal battle to strip California’s authority to set its own fuel-efficiency regulations, saying GM’s goals for green cars are aligned with the state and the incoming Biden administration. In October 2019, GM intervened in a lawsuit filed by environmental groups challenging the Trump administration’s decision to revoke a federal waiver that allows California to set its own tailpipe-emissions standards. GM was joined by Toyota Motor Corp., Fiat Chrysler…