I'm on my third set of oil cooler lines. I have 58,000 km currently and these are leaking as well
I have also had my transmission cooler lines replaced along with my water pump due to a leak. I have had the electronic compass module, a door seal and a water deflector in one of the front doors replaced. There may be a couple of other things as well.
I really like my car but it hasn't been without some issues.
A mechanic friend of mine says "It wouldn't be a GM if it didn't leak". On the other hand, he also commented that "...at least they alway start!"