Pontiac grand am 2005 won't idle

Sounds on the surface like a fuel and air ratio concern. Too much air getting into the engine without being controlled can cause a fuel starvation concern and a stall or difficult starting situation. Other things can cause the problem, so a full engine performance diagnostic will be needed to find out what is happening for sure. In the meantime, ensure all vacuum hoses are connected and properly routed and not broken, and ensure the air cleaner box is closed as it should be, and the air tube is free of splits and tears.