This lowering kit will allow you to lower your 2009 Chev Silverado Ext Cab 3/5, 4/6 and 4/7. You will want to retain your rear leaf spring hanger if you would like to go down to 7" later. Ext/Crew cab models should also be notched, or helpers installed at 6"+ of drop. We have both options available if needed. I have included a Belltech front end alignment kit, this includes 2* camber bushings and 1* cam plates. This will provide 3* total of camber correction, this will get you back within spec. Please note, I only recommend setting the front struts to a max of 2" of drop, I find the ride quality gets a bit rough when set at 3" of drop.