Just got back my truck from the dealer, dropped it off monday morning and got her back today. They let me drive a 2007 Chevy Impala 4 dr black in color, it was all right but i missed my truck.
They resealed the oil pan after they dropped the trans, and replaced both trans cooler lines. Hope this talk care of the problem, I only had 10,500 miles on the truck.

2006 GMC 3500 Duramax CC dually with 12,500 miles. Going in on wednesday for tranny cooler lines! What gives here? I have lost count of all the posts on this and other sites regarding the same thing!

I have 7500 miles on my LBZ and I recently had a similar problem. I took it in for a small oil leak. They said that the oil pan was leaking. All was well for a couple of weeks and then the spots on my driveway reappeared. Took it in again and they found another oil leak that was hidden by the tranny. To fix it they had to drop the tranny and found a small leak on it too.

They put a new gasket on the tranny and resealed the oil pan. It has been two weeks and no leak yet.