Reuss remains focused on rebuilding the Cadillac brand and streamlining GM's product development operations, while doubling the resources, mainly engineering hours, allocated to electric and self-driving vehicle programs in the next two years, the company reiterated.

GM has budgeted $8 billion for the development of electric and self-driving vehicles, with SoftBank Group and Honda Motor Co pledging to invest $5 billion in GM's Cruise self-driving unit.

Ammann became chief executive officer of GM Cruise, the self-driving car unit, on Jan. 1.

The appointment of Reuss, a 35-year GM veteran, comes as the No. 1 U.S. automaker cuts back on producing traditional sedans.

In the United States, GM remains strong in pickups and utility vehicles, which accounted for two-thirds of the company's sales in 2018.

(This story corrects headline to reflect that Reuss is not head of self-driving unit)

(Reporting by Ankit Ajmera in Bengaluru and Paul Lienert in Detroit; Editing by Shinjini Ganguli and Jeffrey Benkoe)