GM Service Manual Online
For 1990-2009 cars only

Fasten Safety Belt Indicator

    • The instrument panel cluster (IPC) illuminates the fasten safety belt indicator when the body control module (BCM) detects that the driver's seat belt is unbuckled. The IPC receives a discrete input from the BCM requesting illumination. When the indicator is on, the BCM activates the audible warning.
    • The IPC performs the displays test at the start of each ignition cycle. The IPC illuminates the fasten safety belt indicator.

Restraint System

Seat belts are the primary means of occupant restraint. Seat belts help to keep the occupants inside the passenger compartment and to gradually reduce the impact forces during the following events:

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

All seat belt retractors have emergency locks. The retractors remain unlocked during normal operation and under normal driving conditions. The retractors remain unlocked during normal conditions in order to allow free movement of the upper body of each occupant. A pendulum locks the seat belt webbing into position. The pendulum causes a locking bar to engage a cog on the spool of the retractor mechanism when the following conditions occur:

    • A rapid extraction of the seat belt webbing from the retractor
    • An abrupt change in the vehicle speed
    • An abrupt change in the vehicle direction
    • Operation of the vehicle on a steep upgrade
    • Operation of the vehicle on a steep downgrade

The seat belts have an automatic locking feature, or cinch feature. After the seat belt is buckled, pulling on the shoulder belt will cause the lap belt to tighten and hold.

Use of the cinch feature is recommended for securing a child seat.

The cinch feature may be canceled by unbuckling the seat belt.

This vehicle is also equipped with a supplemental inflatable restraint (SIR) system. Refer to in SIR.

Front Seat Belt System

The front seat belt system includes the following components:

    • The driver and the passenger seat buckle-side belts, attached to the floor panel inboard of the front seats
    • The driver and the passenger seat retractor-side belts, attached to the floor panel
    • The driver and the passenger seat retractor-side belts, attached to the roof panel in the coupe, or to the body lock pillar reinforcement in the convertible

The seat belt system includes a seat belt switch in the driver seat buckle-side belt. The seat belt switch controls the fasten safety belt indicator and the seat belt alarm. When the driver door is closed and the ignition switch is turned ON, but the driver seat belt is not buckled the seat belt alarm will operate for 4 to 8 seconds and then turn off. Refer to Diagnostic System Check - Seat Belts in Seat Belts in order to diagnose faults in the Seat Belt System.

Rear Seat System

The rear seat belt system includes the following components:

    • The rear seat buckle-side belt, attached to the floor panel inboard of the rear seats
    • The rear seat retractor-side belt, attached to the floor panel and the inner wheelhouse panel in the coupe, or to the floor panel in the convertible, and to the rear seat shoulder belt retractor bracket