GM Service Manual Online
For 1990-2009 cars only
    • Do not expose the inflator modules to temperatures above 65° C (150° F).
    • Verify the correct replacement part number. Do not substitute a component from a different vehicle.
    • Do not repair any of the following components. Service these components by replacement only.
       - The inflatable restraint sensing and diagnostic module (SDM).
       - The inflatable restraint IP (inflator) module.
       - The inflatable restraint steering wheel (inflator) module.
       - The inflatable restraint steering wheel module coil.
       - The inflatable restraint front end discriminating sensor.
       - The inflatable restraint side impact sensing modules (SISM)
       - The inflatable restraint side impact (inflator) modules
    • Use only new or remanufactured parts from an authorized original equipment manufacturer dealer. Do not use salvaged parts for repairs to the SIR system.
    • Discard any of the following components if it has been dropped from a height of 91 centimeters (3  feet) or greater. Do not install the component in a vehicle.
       - The inflatable restraint sensing and diagnostic module (SDM).
       - The inflatable restraint IP (inflator) module.
       - The inflatable restraint steering wheel (inflator) module.
       - The inflatable restraint steering wheel module coil.
       - The inflatable restraint front end discriminating sensor.
       - The inflatable restraint side impact sensing modules (SISM)
       - The inflatable restraint side impact (inflator) modules
    • When you replace the SDM, verify that the following conditions are met:
       - The mounting surface is clean.
       - The arrow on the module points toward the front of the vehicle.
       - The module is flat on the mounting surface, parallel to the vehicle datum line.
       - The module fasteners are installed and tightened as specified.
    • When you replace a SISM, verify that the following conditions are met:
       - The mounting surface is clean.
       - The module is flat on the mounting surface.
       - The module fasteners are installed and tightened as specified.
    • In order to avoid setting false diagnostic trouble codes, only apply power to the SIR system when one of the following two conditions is met:
       - All SIR system components are properly mounted and electrically connected.
       - A diagnostic procedure directs you to apply power.
    • Begin diagnosis of malfunctions with the SIR Diagnostic System Check. Perform the SIR Diagnostic System Check in order to verify the following:
       - The proper operation of the AIR BAG warning lamp.
       - Communication with the SDM through the serial data line.
       - The presence or absence of diagnostic trouble codes.
       - Whether additional diagnosis is required and where the information resides.
    • Not beginning with the SIR Diagnostic System Check could cause the following:
       - Extended diagnostic time.
       - Incorrect diagnosis.
       - Unneeded parts replacement.