Kahne has signed with Hendrick Motorsports for 2011, but there isn't an opening with the organization next year. Mark Martin said Friday he plans to stay in the No. 5 Chevy in 2011. Kahne will take over for that team in 2012.
That led to speculation that Kahne will drive one year for SHR, which has an alignment with Hendrick Motorsports. SHR leases engines and chassis from Hendrick Motorsports.
"You guys need to talk to Kasey because we don't know anything about it," Stewart said Friday. "I found out Tuesday [about Kahne's move] the same time you guys did. I don't have the answers because nobody has talked to me about it. It's all speculation and I can't talk and make it make sense."
Kahne said he has no idea at this point what car he will drive in 2011.
"I'll work through it with Mr. Hendrick and figure it out," Kahne said Friday. "We will do what make the most sense. Rick [Hendrick] said he will make sure it's right. I take that to mean it will be a good situation for me. A lot of people will work on this the next couple of months to make sure that happens."
Stewart said he is not opposed to adding a third car next season if things fall into place.
"We would definitely do it with right opportunity," he said. "If the right sponsor and right driver were to come along, we would consider a third team. But we've said that all along."
Stewart got frustrated with the questions when he was asked if he would add Budweiser, which is Kahne's sponsor now at Richard Petty Motorsports.
"You guys need to go back to your fantasy racing leagues," Stewart said. "I see where we're going here and it just going to get worse."
Stewart also was asked his opinion of Kahne's decision to go to Rick Hendrick's organization.
"I think it's a great opportunity for him," Stewart said. "Only Kasey knows what he wants. I know what I've learned in the short time in the Hendrick system. I've always liked him."
Terry Blount is a senior writer for ESPN.com.