General Motors’ autonomous vehicle unit, Cruise, is in discussions to launch fully self-driving cars for Uber customers in San Francisco by next year, said two people with knowledge of the effort. The talks reflect a growing distance between GM and Uber’s main U.S. rival, Lyft, which previously engaged in a public love affair.

In early 2016, GM committed to launching autonomous vehicles on Lyft’s ride-hailing service. It was part of a broader partnership that involved GM investing $500 million in Lyft and getting a seat on the ride-hailing company’s board. But GM’s autonomous vehicles didn’t materialize, in large part because the technology wasn’t ready.