GM Delays Super Cruise Self-Driving Feature

General Motors Co. says its launch date for a car equipped to drive itself on the highway has slipped by several months because the system isn’t ready.

Dubbed Super Cruise, the technology can automatically accelerate, brake and steer a car while cruising in the same lane under certain highway conditions. GM initially expected to debut the system in its new Cadillac CT6 luxury sedan this fall. Now it says the introduction will occur sometime in 2017.

GM hasn’t indicated why Super Cruise has been delayed, except to say that refining the technology and executing it safely is its primary concern. The company has been evaluating various versions of the system for at least three years.

Word of GM’s postponement comes only days after Tesla Motors Inc. revealed it is tweaking its new hands-free Autopilot software to improve performance. Several users have reported their Model S electric sedans have behaved erratically or nearly crashed because the system failed to assess driving situations correctly.