Installation Procedure

From the rear compartment, feed the rear seat center shoulder belt and escutcheon through opening in the rear shelf trim panel.
Install the retractor to the cross brace.
Carefully lift upward on the rear shelf trim panel.
From inside the vehicle, install the center rear seat belt retractor fastener (2).
Tighten:

Tighten the center rear seat belt retractor fastener (2) to 41 N.m (30 ft lbs)

Fig 1: Center Rear Seat Belt Retractor Fastener
Courtesy of GENERAL MOTORS CORP.
Install the push-in fastener in order to secure the rear shelf trim panel.
Install the center rear seat belt escutcheon to the rear shelf opening.

Fig 2: Center Rear Seat Belt Escutcheon
Courtesy of GENERAL MOTORS CORP.
Install the rear seat back. Refer to SEAT BACK REPLACEMENT-REAR in Seats .
Install the center rear seat belt anchor fastener to the floor.
Tighten:

Tighten the anchor fastener to 41 N.m (30 ft lbs)

Fig 3: Center Rear Seat Belt Anchor Fastener To Floor
Courtesy of GENERAL MOTORS CORP.
Install the rear seat cushion. Refer to SEAT CUSHION REPLACEMENT - REAR in SEATS .