GM Service Manual Online
For 1990-2009 cars only

If the vehicle's safety belt will fasten around you, you should use it.

But if a safety belt is not long enough, your dealer will order you an extender. It is free. When you go in to order it, take the heaviest coat you will wear, so the extender will be long enough for you. To help avoid personal injury, do not let someone else use it, and use it only for the seat it is made to fit. The extender has been designed for adults. Never use it for securing child seats. To wear it, just attach it to the regular safety belt. For more information see the instruction sheet that comes with the extender.

Always disconnect the extender from the safety belt after you use it so that the airbag will work properly the next time someone uses that seat.

When you use a safety belt extender in the right front passenger's seat, make sure the passenger airbag status indicator shows "ON" . See Passenger Airbag Status Indicator . If the indicator shows "OFF", disconnect the extender's latch from the buckle then reconnect the safety belt. Make sure the indicator light shows "ON", then reconnect the safety belt extender. If you use the safety belt extender while the indicator light shows "OFF", the right front passenger's frontal and seat-mounted side impact airbags (if equipped) may not activate correctly. See Airbag System for important safety information about your airbags.