I went to a 7:30 am oil change appointment to put mobil Delvac 1 esp 5w40 in my truck as usual and when the truck was on the hoist i took a walk under it and found four leaks, wow, the back seal where the driveshaft goes into the transfer case was all drenched in tranny fluid, the engine oil cooler line was leaking and the transmission cooler lines were leaking. Good thing that gm came out with the longer warranty in 07 as im sure this would have beena large out of pocket expense. way to go gm.

What should have been a 45 minute oil change turned out to be a three and a half hour leak fixing day......:D