General Motors calls their air bag system a Supplemental Inflatable Restraint (SIR). Most other manufacturers refer to it as a Supplemental Restraint System (SRS). SRS is also widely accepted as the industry standard nomenclature for the system. This manual may use SIR or SRS when referring to the air bag system.
The Sensing Diagnostic Module (SDM) maintains a reserve energy supply with sufficient voltage to cause a deployment for up to ten minutes after the ignition switch is turned OFF , the battery is disconnected or the fuse powering the SDM is removed. Many of the service procedures require removal of the inflator module fuse and disconnection of the deployment loops to avoid an accidental deployment .
DISARMING THE SYSTEM
- Turn the steering wheel to the straight ahead position.
- Turn the ignition to LOCK and remove the key.
- Remove the SIR fuse from the engine compartment fuse block.
- Remove the left side I/P sound insulator.
- Disconnect the connector position assurance (CPA) and the driver yellow 2-way connector located at the base of the steering column.
- Disconnect the Connector Position Assurance (CPA) and the passenger yellow 2-way connector located near the base of the steering column.
ARMING THE SYSTEM
- Turn the ignition to the LOCK and remove the key.
- Connect the Connector Position Assurance (CPA) and the passenger yellow 2-way connector pigtail through the trap door in the I/P compartment.
- Connect the connector position assurance (CPA) and the driver yellow 2-way connector located at the base of the steering column.
- Install the left side I/P sound insulator.
- Install the SIR fuse to the engine compartment fuse block.
- Staying well away from both air bags, turn the ignition switch to the RUN position. Verify that the AIR BAG warning lamp flashes seven times and then stays off. If the AIR BAG warning lamp does not operate as described, the system will have to be diagnosed.