General Motors chief executive Rick Wagoner has called the proposed alliance with Renault and Nissan an "interesting idea" that would get full consideration.
Mr Wagoner, appointed last week by GM's board to lead the team studying the proposal, said he looked forward to meeting Renault-Nissan chief executive Carlos Ghosn.
"It's an interesting idea," Mr Wagoner said. "We look forward to sitting down with Carlos Ghosn soon.
"When this idea was presented, we said we'll take a good look at it. We are looking forward to sitting down. Our minds are completely open."
The two men are expected to meet in Detroit as early as tomorrow.
Under the terms of the proposed tie-up, Nissan and Renault could take a 20 per cent stake in GM as all three manufacturers seek to capture savings by sharing the costs of developing new vehicles and buying components.
GM's board approved exploratory talks on the three-way alliance last Friday and put Mr Wagoner in charge of evaluating the potential benefits.
But Kirk Kerkorian, GM's largest individual shareholder and the catalyst for the tie-up, has called for the review to be entrusted to a board committee with access to outside advisers.
Analysts had expected Mr Wagoner to oppose the potential tie-up, saying it could endanger or end his tenure at the head of the world's largest carmaker.
But Mr Wagoner said that was a misperception, adding that he had "great support from the board of directors".
Some analysts believe that Mr Kerkorian's real aim is to increase pressure on Mr Wagoner and to replace him with Mr Ghosn, who is widely respected by investors for his success in bringing Nissan back from the brink of failure.
Mr Wagoner has faced some criticism for not laying out clearer financial goals for GM as it restructures - an area where investors and analysts say Mr Ghosn has excelled.
"I work for all of our shareholders and all of our board members," Mr Wagoner said when asked about Mr Kerkorian's perceived criticism of his job.
"The goal is to get the GM structure to be competitive in the future and provide the best returns for our shareholders."
GM lost $10.6 billion in 2005 as it struggled with high labour costs, sluggish sales of sport utility vehicles and loss of US market share to foreign rivals.