I have a 07 Chevy avalanche LT 5.3 2wd.
I'm wanting to put off road package upper and lower control arms ( these are made of aluminum ) will these fit if my truck didn't come with the off road package? ?

 

I only did a quick search but it appears the same control arms fit 2wd and 4wd.
The question is what are you trying to do with it?
Seems theres a lot cheaper and easier ways to lift it for bigger tires.
Only so much off-roading out there for a 18" 6000lb truck let alone a 2 wheeler.

 

I thought the AL control arms were from the XFE (extra fuel mileage) GMT900.