These are identical to the springs that I removed from my 2008 Chevy Suburban LTZ (Z55 Suspension). I installed them with AC Delco electronic dampers. Some people prefer to remove electronic suspension components, but I would never do that. Z55 Ride is better. My friend has an LT without and I notice it every time I ride it. If you make shock absorbers, be sure to spend the money on coils. It's not worth the labor twice and the coils are a fraction of the damper price.