GM Service Manual Online
For 1990-2009 cars only

The inflatable restraint sensing and diagnostic module (SDM) maintains enough voltage in order to cause an air bag deployment for up to 10 minutes after any of the following situations occur:

    • The ignition switch is turned to the OFF position.
    • The battery is disconnected.
    • The fuse that is powering the SDM is removed.

Many of the service procedures require removal of the AIR BAG fuse and disconnection of the deployment loops. These actions help avoid an accidental air bag deployment. If the inflator modules are disconnected from the deployment loops, service can begin immediately without waiting for the 10-minute time period to expire. Refer to Disabling the SIR System and Enabling the SIR System in SIR.