I have noticed today my pontiac G6 V6 3.5L was getting to hot. I pulled over and seen coolant resvoir was empty. I went to auto parts store and refilled it. As I did so seen steady leak coming from under care on passenger side front underneath behind area of head light. Cannot tell where or what this is coming from. Also it only does it when car is running and warmed up some. I would appreciate any input and also if anyone knows where I can get a free diagram online to print out of that area. Thanks.