I am wanting to put a leveling kit on my 2011 gmc sierra z71 4x4. I dont know what size front spacers to buy in order to level it so 285's or 33's will fit on it. Any advice would be helpful. Thanks

I put 2 7/8 level kit on my F150 from fatbobsgarage.com on a level garage floor, measure from floor to top of wheel well, front, then back. Then do the math...Back - front = right leveling kit.

Also, check forums for what people are saying is good vs. bad. I went with a over-the-strut steel kit. Some say I should have added something to level out the front arms, but it is fine. After leveling, go to Firestone and get the lifetime alignment for $150.

I would lift the front and rear by the same amount. I hate how a truck looks with the front level with rear or even worse higher. If you pull anything or load the bed down it will be even worse.

A slight slant forward is a good look to me as long as its not excesive.

get the rough country spacers only like 75 bucks and pretty easy to install. I personally like the level look but since I tow alot of stuff I put the add a leaf in the rear.

I did the RevTel 2" Leveling kit paired with the ReadyLift 1 1/4" rear blocks to clear 285/55/r20s on my truck. On the stock 17s, 285/65s cleared, but the offset of the new wheels required slight (very simple) modification to clear in all articulations.