GM Service Manual Online
For 1990-2009 cars only

Seat belts are the primary means of occupant restraint. Seat belts help to keep the occupant inside the passenger compartment and also help to ride down the crash forces more gradually during the following events:

    • Frontal impact type crashes.
    • Rear impact type crashes.
    • Side impact type crashes.
    • Roll over type crashes.

All seat belts have emergency locks in the retractors. During normal operation, the retractors remain unlocked to allow free movement of the occupant's upper body under normal driving conditions. The seat belt webbing is locked into position by a pendulum that causes a locking bar to engage a cog on the spool of the retractor mechanism under the following conditions:

    • Rapid extraction of the seat belt webbing from the retractor.
    • The speed of the vehicle changes abruptly.
    • The direction of the vehicle changes abruptly.
    • The vehicle is on a steep upgrade or a downgrade.

In conjunction with the seat belts, this vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Refer to Supplemental Inflatable Restraint for more information about the (SIR) system.