Differential leak drivers side

[TroysH2]

Update to prior post.

>After almost 10 weeks, 5 visits, dozen's of calls to the dealer, the Hummer National customer service and advise from this forum, the service department finally admits the leak is comming from the differential!

>After being assured that the leak was from the differential vent plug (no oil near the plug), then the oil filter(located in the rear), and that there is no leak...

>Now they said that they have to order an entire assemble (knuckle/shaft/yoke/seal)?

Has anyone else had this repaired in this manner.
thanks in advance,
troy