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Home › GMC › 2003 › Sierra 1500 HD, 4WD › Repair and Diagnosis › External Pages › Different car › Section 249 (Supplemental Inflatable Restraint System) › Repair Instructions › Inflatable Restraint Sensing and Diagnostic Module Replacement › Installation Procedure

Installation 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.
  1. Remove any dirt, grease, or other contaminants from the mounting surface.
    2. Fig 1: SDM
    GM388339Courtesy of GENERAL MOTORS CORP.
  2. Install the SDM (3) horizontally to the vehicle.
  3. Point the arrow on the SDM toward the front of the vehicle.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Install the SDM mounting fasteners.

    Tighten:  Tighten fasteners to 10 N.m (89 lb in).

  5. Connect the SDM wiring harness connector (1) to the SDM.
    6. Fig 2: View Of Connector Position Assurance (CPA) Flex Lock Button
    GM466123Courtesy of GENERAL MOTORS CORP.
  6. Push down the flex lock button (3) and slide the connector locking cover (4) to the close position.
  7. Install the connector position assurance (CPA) (1) to the inflatable restraint sensing and diagnostic module (SDM) wiring harness connector (2).
  8. Position the carpet to cover the inflatable restraint sensing and diagnostic module (SDM).
  9. Install the door sill plate. Refer to Door Sill Plate Replacement - Front in Interior Trim.
  10. Install the driver seat. Refer to Seat Replacement - Front Bucket in Seats.
    11. IMPORTANT: The AIR BAG indicator may remain ON after the SDM has been replaced. DTC B1001 may set requiring the SDM part number to be set in multiple modules. If the indicator remains ON after enabling the SIR system, perform the diagnostic system check and follow the steps thoroughly to ensure that the SDM is set properly.
  11. Enable the SIR system. Refer to SIR Disabling and Enabling Zone 7 .
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