Do I Need Keys?????

Quick question..... I have a 2007 Yukon XL. I want to raise the front about 1.5" to level out with the rear. Can I use torsion keys? OH.. and yes, it's a 2 wheel drive.

You don't need torsion keys, all you need are spacers for the front lift, Revtek has a good kit for the new body Tahoe's and Yukons, it'll easily clear up to 33" tires after installation.
Most Leveling kits will lift the front 2", so there are many brands to look at, www.4wheelonline.com has alot of good Leveling brands under the Level Kits tab.
The brand i'm familiar with is this, http://www.revtek.com/gmcsusp.asp#315

Buy some spacers off ebay, they're all the same.
http://cgi.ebay.com/ebaymotors/2-Li...318QQhashZitem310065882676QQitemZ310065882676
I can hook you some readylift spacers for cheap if you want em, I have an extra set laying around and they'll give you 1.5" of lift which will clear a 285/70/17 with some trimming. You can't run a 12.5" wide tire on these trucks without alot of backspacing and some cutting.

Thanks! Boostaholic, how much for the spacers? Would they be applied to the upper strut? I've seen some on ebay, some say applied to lower strut, others say upper strut. I can imagine upper strut spacers would be easier to install? I'm actually running 24s, however my rear end is sticking up. Just trying to somewhat level with a slight rake in the rear.

Upper strut, pretty easy to install check www.readylift.com