[2010_5thgen]

i have the green keys for my hummer, how much will those lift the front end before the ride just goes down hill? can i get 3" of lift out of it or is that too much? im thinking about getting 2" rear shock spacers and then leveling the truck off. and i think it will be around 2 1/2" -3" that the green keys will have to go up. if i can only get 2" of lift, ill go with 1.5" shock spacers for the rear. any opinions?