They weigh a lot less than the cast iron arms and give you a better ride due to less unsprung weight. I couldn't find the PNs at the time so I just swapped BJs. With the price of those PNs listed it would be well worth it since BJs are going to cost 60-70 plus getting someone to press them which cost me 55. I'd pay a little more to get the aluminum arms. I may go ahead and get them but it'll be a while.

 

I like the sound of this. Are you saying they can replace the stock LCA's on a NBS truck? Will they work on a 4wd?

 

These should be a direct swap for any gmt900

 

avalanches also use the same aluminum control arm so try searching for that, Im not sure about the last couple years, but 07-09 they definitely had them