Yep, same here, 07 gmt900. Went to dealer for oil change last week ( 2 degrees outside). And the tech shows me the seeping lines, wanted $600 for trans lines and $400 for oil lines, thanked him for the notice and got the hell out of there. Googled the leaking lines and see it is common in freezing temps. Ordering new lines about $110 in parts, and will do when it warms up a little.