GM Service Manual Online
For 1990-2009 cars only

Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:

   • Air bag deployment
   • Personal injury
   • Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:
   • Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
   • If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System.

The sensing and diagnostics module (SDM) maintains the voltage necessary in order to cause a deployment for up to 10 seconds after turning the ignition switch to the OFF position or disconnecting the battery. Many of the service procedures require the disconnection of the air bag 1 fuse and the inflator module circuits from the deployment loops in order to avoid and accidental deployment.

Disabling the SIR System

Refer to Disabling the SIR System in Supplemental Restraint System (SIR).

Enabling the SIR System

Refer to Enabling the SIR System in Supplemental Restraint System (SIR).

Electrostatic Discharge (ESD)

Many solid state electrical components can be damaged by Electrostatic Discharge (ESD). Some will display a label indicating this sensitivity. Many electrical components which are ESD sensistive will not, however, dispay a label. Therefore, the following procedures should always be used when handling electrical components.

    • Body movement produces an electrostatic charge. To discharge personal static electricity, touch a ground point (metal) on the vehicle. This should be done any time you perform any of the following activities:
       - Sliding across the vehicle seat
       - Sit down or get up
       - Do any walking
    • Do not touch exposed electrical terminals on components or connectors with your finger or any tools. Remember, the connector you are checking might be tied to a circuit that could be damaged by ESD.
    • When using a tool to disconnect a connector, never let the tool come in contact with or come between the exposed terminals.
    • Never ground, use a jumper, or use test equipment probes on any components or connectors unless instructed to do so in a diagnostic procedure. When using test equipment, always connect the ground lead first.
    • Do not remove the solid state component from its package until you are ready to install the component.
    • Always touch the solid state component's package to a ground before opening. Solid state components can also be damaged if one of the following events takes place:
       - The component is bumped or dropped
       - The component is placed on a metal work table
       - The component is placed on or near another component that operates electrically such as a radio, television or oscilloscope.

Adhere to the following guidelines when handling an electronic part on which is an ESD-sensitive sticker:

    • Do not open the package prior to installing the component.
    • Avoid touching any electrical terminals on the component.
    • Ground the package to an adequate ground on the vehicle prior to removing the component from the package.
    • Be certain to touch an adequate ground in the following instances:
       - Prior to removing the component from the package
       - After sliding across the seat
       - After sitting down from a standing position
       - After walking a distance