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Home › Chevrolet › 2004 › Classic › Repair and Diagnosis › Restraints › Air Bag, SRS › Supplemental Inflatable Restraint System › Repair Instructions › Inflatable Restraint Steering Wheel Module Coil Replacement › Installation Procedure

Installation Procedure

    Fig 1: Expanded View of Correctly Aligned Block Tooth & Centering Mark on Race & Upper Shaft Assembly
    GM332911Courtesy of GENERAL MOTORS CORP.
  1. To install the SIR coil, perform the following procedure:
    1. Aim the wheels straight ahead.
    2. Align the block tooth and the centering mark on the race and upper shaft assembly at the 12 o'clock position.
    2. Fig 2: View Of SIR Coil
    GM396373Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The new SIR coil will be pre-centered. Do not remove the centering tab from the new SIR coil until the installation is complete. If the SIR coil does not come with a centering tab, you must center the SIR coil.
  2. If centering is required, refer to Inflatable Restraint Steering Wheel Module Coil Centering in Steering Wheel and Column.
    3. Fig 3: Aligning SIR Coil Assembly With Horn Tower
    GM312359Courtesy of GENERAL MOTORS CORP.
  3. Align the SIR coil assembly (1) with the horn tower on the turn signal cancel cam assembly (2).
    4. Fig 4: Identifying SIR Coil, Steering Shaft Assembly & Retaining Ring
    GM322951Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The new SIR coil will be pre-centered. Do not remove the centering tab from the new SIR coil until the installation is complete.
  4. Slide the new SIR coil (4) onto the steering shaft assembly (2).
  5. Firmly seat the retaining ring (3) into the groove on the steering shaft assembly (2).
  6. Remove and discard the centering tab from the new SIR coil (4).
  7. Connect the SIR harness to the back of the fuse panel.
  8. Install the instrument panel carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages, and Console.
  9. Install the steering column trim covers. Refer to Steering Column Trim Covers Replacement in Steering Wheel and Column.
    10. Fig 5: Steering Wheel, Shaft & Nut
    GM294367Courtesy of GENERAL MOTORS CORP.
  10. Feed the wiring through the steering wheel.
  11. Align the steering wheel with the mark on the steering shaft. Install the steering wheel onto the shaft.
  12. Install the nut for the steering wheel.

    Tighten:  Tighten the nut to 41 N.m (30 lb ft).

  13. Install the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement .
  14. Enable the SIR system. Refer to SIR Disabling and Enabling Zone 3 .
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