GM CIO Randy Mott said the car company hopes to add the HP workers, part of a team running GM's IT operations under outsourcing contracts, over the next six months.

Mott, named CIO of GM earlier this year, decided early on in his tenure to bring most of the automaker's IT work in-house, a major shift for a company that has long relied on outsourcers.

Under Mott, GM is consolidating and automating IT operations and plans to use the savings to work on innovating its product lines and business operations.

GM plans to reduce its worldwide data center roster from 23 to two within three years, as well as cut the number of its applications by about 40% "as we drive more application commonality and common processes across GM," said Mott.

In a conference call, Mott said the former HP employees will see their jobs "changing pretty rapidly over the course of the transformation," as the company feels that it's important that the workers become "well-integrated into the GM team."