GM Service Manual Online
For 1990-2009 cars only

Your vehicle has safety belt pretensioners for the driver and right front passenger. Although you cannot see them, they are located on the buckle end of the safety belts. They help the safety belts reduce a person's forward movement in a moderate to severe frontal and near frontal crash.

Pretensioners work only once. If they activate in a crash, you will need to get new ones, and probably other new parts for your safety belt system. See Replacing Restraint System Parts After a Crash .