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Home › GMC › 2003 › Sierra 1500 HD, RWD › Repair and Diagnosis › External Pages › Different car › Section 249 (Supplemental Inflatable Restraint System) › Repair Instructions › SIR Disabling and Enabling Zone 1 › Disabling Procedure

Disabling Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: Refer toSIR Service Precautions  before disabling the SIR system.
  1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
  2. Turn OFF the ignition.
  3. Remove the key from the ignition.
    4. IMPORTANT: With the SIR fuse removed and the ignition ON, the AIR BAG indicator illuminates. This is normal operation and does not indicate an SIR system malfunction.
  4. Remove the SIR fuse from the fuse block.
  5. Raise and support the vehicle.
    6. IMPORTANT: This vehicle is equipped with two inflatable restraint front end sensors. When performing this procedure be sure to include both front end sensors.
    Fig 1: Disconnecting Both Front End Sensor Connectors - Zone 1
    GM859932Courtesy of GENERAL MOTORS CORP.
  6. Remove the connector position assurance (CPA) from both front end sensor connectors (2) located on the frame crossmember (1).
  7. Disconnect both front end sensor connectors (2).
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