I have a 2008 sierra crew cab with a 6" rear drop with mcgaughy helpers #34043. When I installed the bags I noticed that the bag didn't reach all the way up to the upper bracket without jacking up the rearend alittle bit, which I didn't think was to big of a deal. The next day I added air to the bags and from 0-90 psi I only got about 1.5" of lift, is this normal for this set-up? I also can't let the rearend droop all the way without unbolting the bag from the upper mount, looks to me like the bag would rip apart if I left it bolted up. I know that this part isn't right, its over 2" from reaching the top bracket. I called mcgaughys and he said it isn't made to lift the truck much, its more of a load baring bag. I had airlift helpers on my 95 with a 4/6 drop and no problems at all, I got about 2-3" of lift or more out of them. I'll post pix to show what i'm talking about.