need some help, i have a 06 sierra cc and i just got a 2pc shaft for it but its out of a hd ext cab gm truck i was told, has anyone out there use a hd shaft if what u joints do i need to bolt to the rear diff. my tuner said since the hd came with a 14bolt i may not be able to use the shaft, and i do believe what he says he's helped me alot so far. but anyway if anyone has done this swap chime in please....

 

If the length is right. You can use specialty ujoints to bolt everything up