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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 455 (Supplemental Inflatable Restraint System) >> Repair Instructions >> Steering Wheel Inflatable Restraint Module Coil Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Block Tooth Of Steering Shaft Assembly In 12 O'clock Position
    GM293254Courtesy of GENERAL MOTORS CORP.
    CAUTION: The new SIR coil assembly will be centered. Improper alignment of the SIR coil assembly may damage the unit, causing an inflatable restraint malfunction.
    CAUTION: With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components:
    • The steering column
    • The intermediate shaft(s)
    • The steering gear

    After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has became un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil.
  1. Verify the following:
    • The wheels on the vehicle are straight ahead.
    • That J 42640  is installed or the ignition switch is in the LOCK position.
    2. Fig 2: SIR Coil
    GM396373Courtesy of GENERAL MOTORS CORP.
    NOTE: 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 reusing the existing coil it MUST be centered, refer to Inflatable Restraint Steering Wheel Module Coil Centering .
    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: SIR Coil, Steering Shaft Assembly & Retaining Ring
    GM322951Courtesy of GENERAL MOTORS CORP.
  4. Slide the 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. Fig 5: Removing/Installing Upper Trim Cover
    GM283271Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  7. Install the upper trim cover (1) and secure by using 2 TORX® head screws (2) and tighten to 2 N.m (18 lb in).
    8. Fig 6: Removing/Installing Lower Trim Cover
    GM283270Courtesy of GENERAL MOTORS CORP.
  8. Install the lower trim cover (2) and secure by using 2 TORX® head screws (1).
    9. Fig 7: Upper & Lower Trim Cover Tabs
    GM283273Courtesy of GENERAL MOTORS CORP.
  9. Verify that the tabs on the lower trim cover (1) engage with the tabs on the upper trim cover (2). Snap the tabs together and tighten to 2 N.m (18 lb in).
    10. Fig 8: Removing/Installing Tilt Lever
    GM82174Courtesy of GENERAL MOTORS CORP.
  10. On vehicles with a tilt column, align the tilt lever into the steering column.
  11. Slide the tilt lever handle into the steering column until the handle locks into position.
    12. Fig 9: Steering Wheel, Shaft & Nut
    GM294367Courtesy of GENERAL MOTORS CORP.
  12. Install the steering wheel onto the steering shaft. Refer to Steering Wheel Replacement .
  13. Enable the SIR system. Refer to SIR Disabling and Enabling .
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