Seat Belt System Description. GMC Truck GMC C Pickup

Front Seat Belt System

Caution: Restraint systems can be damaged in a collision. To help avoid injury and ensure that all parts in need of replacement are replaced:

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Replace any seat belt system that was in use during the collision serious enough to deploy any automatic restraint device such as air bags and seat belt pretensioners. This not only includes seat belt systems in use by people of adult size, but seat belt systems used to secure child restraints, infant carriers and booster seats, including LATCH system and top tether anchorages.

•	Replace any seat belt system that has torn, worn, or damaged components. This not only includes adult seat belt systems, but built-in child restraints and LATCH system components, if any.

•	Replace any seat belt system if you observe the words "REPLACE" or "CAUTION", or if a yellow tag is visible. Do not replace a seat belt if only the child seat caution label is visible.

•	Replace any seat belt system if you are doubtful about its condition. This not only includes adult seat belt systems, but built-in child restraints, LATCH system components, and any restraint system used to secure infant carriers, child restraints, and booster seats.

Do NOT replace single seat belt system components in vehicles that have been in a collision as described above. Always replace the entire seat belt system with the buckle, guide and retractor assembly, which includes the latch and webbing material.

The front seat belt system includes a driver and\or passenger seat belt retractor and buckle.
The driver's seat belt system, includes a seat belt switch in the driver seat buckle which controls a reminder lamp and a tone alarm. When the driver seat belt is buckled, the driver's door is closed, and the ignition switch is turned ON, the following events will occur:

•	The tone alarm will not operate.

•	The reminder lamp will not operate.

When the driver's seat belt is not buckled, the driver's door is closed, and the ignition switch is in RUN, the following events will occur:

•	The tone alarm will operate for 4 to 8 seconds and then go OFF.

•	The reminder lamp will operate for 20 seconds, until the driver seat belt is buckled.

•	Then the reminder lamp will flash for an additional 55 seconds before going OFF.

•	To diagnose a failure of the reminder lamp or the tone alarm, refer to A Diagnostic System Check - Audible Warnings in Instrument Cluster.