Want to lower my 2008 tahoe !

Hi, I need some inputs from you guys. I have a 2008 tahoe that I want to lower. tahoe has stock 20" from GMC and I'm not planning on buying 22" or anything bigger so I will keep those 20". I want to buy a suspension kit that could lower my tahoe 4" front 5" rear but need help from you guys.
thanks
if anyone has done it can u please post some pictures.

you can go if you havent already , you could piece a kit together from the parts ! www.mcgaughys.com