Another buddy at work with truck problems!!!

It's a 2003 GMC Sierra Extened cab short bed 2wd with 5.3l automatic. He has a 6 inch RCD lift with 35 inch BFG's. He broke a right tie rod while off-roading, and has replaced it and aligned it several times. The problem is that the truck still pulls to the right and nobody at the different shops have been able to align the truck correctly. Tires, wheels, and frame were all checked and found to be in good conition.

Anybody have any clue as to what is causing the truck to still pull, and for the alignment to not come out right?

Thanks for the help,
Steven