GMC Hummer H2 2004 Manual page 16

Fig. 8: Seat Belt Buckle & Seat Frame
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice in Cautions and Notices.
1. Install the buckle to the seat frame.
2. Install the buckle bolts.
Tighten: Tighten the bolts to 53 N.m (39 lb ft).