I have a 2011 Chevy Avalanche LTZ with Z55 front suspension and auto-leveling rear shocks. I added a 2.5" front lift as well as a 1" rear. There is no backlight, it wasn't difficult to install. The front end will need a little nudge to get the electronic connectors to the top of the uprights, but they stayed and I had no problems. I didn't have to grind the post mounting bolts to fit as instructed. I had trouble trying to fit the included self-locking nuts. They loosened the screws on the lifting discs. I went and bought some stainless steel nuts with no teflon self-locking. After they are tightened, you can attach the included nuts to them.
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