GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Blazer - 4WD - RHD 🢒 Restraints 🢒 SIR 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

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
   • Point the arrow on the SDM toward the front of the vehicle
   • Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

Removal Procedure
  1. Disable the SIR system. Refer to Disabling the SIR System .
  2. Remove the floor console, if equipped, Refer to Front Floor Console Replacement in Instrument Panel, Gages and Console.
  3. Cut an X in the carpet over the inflatable restraint sensing and diagnostic module (SDM).
  4. Fold the carpet back to expose the SDM.
  5. Remove the connector position assurance (CPA) (4) from the SDM harness connector (3).
  6. Disconnect the SDM harness connector (3) from the SDM (2).

    7. Object Number: 388336 Size: SH
  7. Remove the SDM mounting fasteners (1).
  8. Remove the SDM (2) from the vehicle.

    9. Important: The following repair procedure should only be used in the event that the inflatable restraint sensing and diagnostic module (SDM) mounting studs and/or fasteners are damaged to the extent that the SDM may no longer be properly mounted.

  9. Repair the fasteners using the following procedure:
    10. 9.1. Remove the stripped nut and discard the nut.
    9.2. Drill out the weld spots to the weld stud from the floor pan side, then remove and discard the stud.
    9.3. Condition the floor panel attaching surface where the new stud is to be installed.
    9.4. Install the new weld stud GM P/N 115115602 and clamp the weld stud.
    9.5. Migweld the stud at the drilled holes from above or below the floor pan, as required.
    9.6. Apply body sealer GM P/N 9984248 around any exposed openings.
    9.7. Install a new fastener GM P/N 11515933.

Installation Procedure

    Object Number: 388336 Size: SH
  1. Install the SDM (2) to the vehicle.

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

  2. Install the SDM mounting fasteners (1).

    3. Tighten
    Tighten fasteners to 12 N·m (106 lb in).

  3. Install the SDM harness connector (3) to the SDM.
  4. Install the connector position assurance (CPA) (4) to the SDM harness connector.
  5. Tape the cut carpet to cover the inflatable restraint sensing and diagnostic module (SDM).
  6. Install the floor console, if equipped. Refer to Front Floor Console Replacement in Instrument Panel, Gages and Console.
  7. Enable the SIR system. Refer to Enabling the SIR System .