Deactivate air springs and remove the rear wheel. Support the swing arm from below with a suitable jack, ensuring that the shock absorber prevents the drive axle and wheel bearing carrier from dropping too far. Supporting the wheel bearing carrier before disconnecting the shock absorber mounting fasteners helps prevent damage to the brake hose, parking brake cable, and drive axle CV joints. In the cargo compartment, remove the cargo floor and trim panels, then take out the fasteners in the plastic floor supports and remove the supports. Next, remove the upper shock absorber mount fasteners and the lower mounting bolt, then lower the shock absorber out of the wheel housing. For installation, reverse the removal process while ensuring all threaded bolts, nuts, and mating surfaces are clean. Install the shock absorber upper mount to the subframe using new self-locking nuts, making sure the long lower shock absorber bushing fits in the hole in the suspension swing arm. Activate and fill the air suspension, and tighten fasteners to final torque only after the vehicle has been lowered and the suspension has settled.