General Service Instructions

^ 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 Instrument Panel (IP) (inflator) module.
- The Inflatable Restraint Steering Wheel (inflator) Module.
- The Inflatable Restraint Steering Wheel Module Coil.
^ Use only original GM replacement parts available from your authorized GM 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.
^ 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.
^ 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.