I did a search and was able to understand how they work. But I was not able to figure out where you all are buying them?

Is it a do it yourself job or shop job?

Is alignment needed?

Thanks

You can get them through some of the supporting vendors, or at your local GM parts department. You can do it yourself with the right tools, but you'll still need to align it afterwards. Most lift/alignment shops charge less than $100 to install & align so the cost savings of doing it yourself is minimal.

Thanks Much !!!!!

http://www.gmdieseltech.com/store2/cart.php?target=category&action=view&category_id=2 81 (http://www.gmdieseltech.com/store2/cart.php?target=category&action=view&category_id=281)