I simply installed them. It would have been very easy, but it was just me. I had to pry off the stabilizer with my foot and put it in the back. I installed the screws pointing upwards like standard screws. You can't put the screw under the axle, it's easy to do, it has to go from below. BE SURE TO CUT THE SCREWS about 1/4"-3/8" so the exposed bolt doesn't hit the axle (4x4 only) and tighten! Installing the screws facing up does not expose the threads on the underside of the vehicle. If you slip on something while riding off-road, the threads of the bolts will be stripped. It lifted my 2008 Suburban LTZ forward a full 2 inches. I added a 1" quick jack in the back to even it all out. I ended up ordering the 1.5 inch because I want my ride to be a bit of a rake. If you have an LTZ or SLT, you probably have the Z55 suspension found on Cadillacs and Denalis. You need to lengthen the sensors so the shocks don't think they've lengthened 1-2 inches. Much luck.
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