WASHINGTON — General Motors Co. said it has received permission to use $2.8 billion of its government aid to help buy part of troubled auto parts supplier Delphi Corp., the automaker’s former parts division.

The Detroit automaker said Monday in a regulatory filing with the U.S. Securities and Exchange Commission that the Treasury Department granted the release of $1.7 billion to acquire “a membership interest” in the new Delphi entity that emerged from bankruptcy protection.

Under the deal, GM will take back some of Delphi’s businesses, including its Saginaw (Michigan), global steering operations and parts manufacturing facilities in Kokomo, Lockport and Rochester (New York)and Wyoming (Michigan).

The size of the ownership stake was not disclosed but GM is expected to receive a minority interest in the auto supplier that will diminish over time as GM is repaid for its investment.

GM will use $1.1 billion to buy Delphi’s global steering business and four parts manufacturing facilities, ensuring a steady stream of critical parts to the automaker. Delphi produces about 10 percent of the parts used in GM’s global manufacturing, and its components go into nearly all of GM’s North American production lines.

GM has received more than $50 billion in government aid and the automaker will draw on the proceeds of $16.4 billion that was deposited in escrow by the government. Delphi recently emerged from bankruptcy and GM agreed to buy an equity stake in the parts supplier as part of the deal.

The U.S. government owns a 61 percent stake in GM after it was forced into bankruptcy and reorganized. GM must receive approval from the government to use its federal aid.

Troy, Michigan-based Delphi, once GM’s parts division, was spun off in 1999 as a separate company but filed for bankruptcy in October 2005.