GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Vivant 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

Removal Procedure

    Caution: Be careful when you handle a sensing and diagnostic module (SDM). Do not strike or jolt the SDM. Before applying power to the SDM:

       • Remove any dirt, grease, etc. From the mounting surface.
       • Position the SDM horizontally on the mounting surface.
       • Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value.
    Failure to follow the correct procedures could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

    Important: If the vehicle interior has been exposed to extensive water intrusion such as water leaks, driving through high water, flooding, or other causes, the sensing and diagnostic module (SDM) and SDM connector may need to be replaced. With the ignition OFF, inspect the area around the SDM, including the carpet. If any significant soaking or evidence of previous soaking is detected, the water must be removed, the water damage repaired, and the SDM and SDM connector must be replaced. Before attempting any of these repairs, the supplemental restraint system (SIR) must be disabled. Refer to SIR Disabling and Enabling .


    Object Number: 1280458 Size: SH
  1. Disable the SIR system. Refer to SIR Disabling and Enabling .
  2. Remove the floor console. Refer to Front Floor Console Replacement .
  3. Remove the connector position assurance lock, which is tethered to the SDM connector (3).
  4. Disconnect the SDM electrical connector (3).
  5. Remove the SDM mounting bolts (1) and discard them.
  6. Remove the SDM (2).

Installation Procedure

    Object Number: 1280458 Size: SH
  1. Install the SDM (2).

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the new SDM mounting bolts (1).

    3. Tighten
    Tighten the SDM Mounting Bolts to 10 N·m (89 lb in).

  3. Connect the SDM electrical connector (3).
  4. Install the connector position assurance lock, which is tethered to the SDM connector (3).
  5. Install the floor console. Refer to Front Floor Console Replacement .
  6. Enable the SIR system. Refer to SIR Disabling and Enabling .