The Eibach 3882.520 is a set of two rear coil springs for 2002–2006 Cadillac Escalade and Chevrolet Avalanche 1500 trucks in 2WD and 4WD form. It lowers the rear of the truck while the front torsion bars stay adjustable, so you set front height separately. The springs were tested with factory dampers. Compared with a cheap spring, the manufacturer's five-year warranty is a real hedge against premature sag or failure, and the design needs no add-on retaining straps. Owners searching for a 2002 Avalanche Z71 rear lowering spring, a 2WD Escalade 2-inch drop, or a Pro-Kit handling upgrade will find this is the factory-matched option for these platforms.
Drop is application-specific: the manufacturer lists about 2.0 in (Rear) for the Escalade, and 1.8 in Rear for the Avalanche. Trucks equipped with Premium Ride Suspension (Nivomat load leveling shock) must have that rear shock swapped for a standard unit, so check your suspension package before ordering.
The manufacturer states that Premium Ride Suspension trucks need their rear Nivomat load-leveling shock replaced with a standard shock, and the kit is not listed for lowering those models without that change.
The kit covers the rear only; the front torsion bar is adjusted separately. The manufacturer states its Pro-Truck kits never require add-on retaining straps.
The manufacturer's install sheet recommends a hoist and says the work should be done by a qualified mechanic experienced with suspension spring removal, with the vehicle always supported on safety stands and wheels blocked. Reuse the original spring isolators, dampers, and tubing, and install each spring with the Eibach logo facing up. Afterward, check rear camber and toe, tire clearance, brake line routing, and ABS sensor clearance. Owners on user forums report that a rear install can take roughly 30 minutes with air tools, and that the passenger-side parking brake cable bracket can limit how far the axle drops until it is moved aside.
