Hummerstein:
I concur with JJ and Adam, it is the dealer that is the issue. Had the leak been diagnosed properly, you'd likely have prevented the Transfer Case seizure.
I'm another owner of many GM trucks and SUVs. I had a Blazer with 260K on the same engine [350ci] and tranny [NP203] with absolutely no problems other than having to replace an alternator and fuel pump well near 150K.
My GMC Yukon was likewise bulletproof - never in the shop; not even once [I change my own oil].
My local dealer is very supportive and top-notch.
Contact Hummer on this one!
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