Dan Ammann is out as chief of Cruise, G.M.'s driverless-car unit.

The top of Cruise, Common Motors’ autonomous-driving unit, is leaving the corporate, the carmaker said Thursday with out giving a cause. Dan Ammann, a former funding banker who’s from New Zealand, gave up his job as G.M.’s president to take over Cruise at the start of 2019. Since then, expectations for autonomous driving have cooled