GM 20833675
Strut

The initial step for Shock Absorber (1500) replacement requires raising and supporting both vehicle and rear axle. The electronic suspension control connector needs to be disconnected if it is present. Before proceeding, you should enable air leveling using an on ignition alongside a scan tool then clear all air pressure from the system for 60 seconds. The replacement process begins by disconnecting the air line when present followed by the removal of upper Shock Absorber nuts and bolts and then lower Shock Absorber nuts and bolts and finally the Shock Absorber. The procedure starts by installing the Shock Absorber followed by placement of the upper Shock Absorber nut and bolt . Keep in mind the fastener caution guidelines during the process. Move to the installation of the lower Shock Absorber nut and bolt while torquing upper and lower nuts and to 115 nm (85 lb ft). The installation requires reconnecting the electronic suspension control connector when present together with reconnecting the air line when fitted. Lower the vehicle by removing the support which holds the rear axle. Turn on ignition with engine off along with the start of a scan tool process followed by air compressor operation for 30 seconds until the vehicle rear section starts to elevate. Reconnect the scan tool while turning off and then back on the ignition key with engine running to allow the air suspension system to adjust its rear suspension position.

The inboard strut mounting studs should be spaced closer together than the outboard stud, which should face outward for proper alignment.