325287 Front Transfer Case Bearing, 261XHD / 263XHD.
For 2001, 2002, 2003, 2004, 2005, 2006, 2007 GM 6.6L Duramax LB7 LLY LBZ
Located in the front half of the transfer case and can be damaged if there is an internal hard part failure with metal debris that can get stuck in the bearing causing it to fail.