One problem related to front seat belt buckle assembly has been reported for the 1999 GMC Sierra. The most recently reported issues are listed below.
Driver's passive restraint is inoperable. Restraint has locked in one position. The dealer has repaired and replaced the restraint previously. Manufacturer has been notified. Also, mechanism that locks the driver's seat in the track broke while driving, almost caused loss of control.
| Front Seat Belt Retractor problems | |
| Front Seat Belt Anchorage problems | |
| Front Seat Belt Webbing problems | |
| Front Seat Belt Buckle Assembly problems | |
| Seat Belt problems |