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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 980 (Supplemental Inflatable Restraint System) >> Repair Instructions >> Inflatable Restraint Steering Wheel Module Coil Replacement (Coil and Harness Assembly) >> Removal Procedure

Removal 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.
    CAUTION: Refer to SIR Caution in Cautions and Notices.
  1. Disable the SIR System. Refer to SIR Disabling and Enabling Zone 3 .
    2. NOTE: The wheels of the vehicle must be straight ahead and the steering column in the LOCK position before disconnecting the steering column or intermediate shaft from the steering gear. Failure to do so will cause the SIR coil assembly to become uncentered, which may cause damage to the coil assembly.
  2. Verify the following before removing the SIR coil:
    • The wheels on the vehicle are straight ahead.
    • That J 42640  is installed or the ignition switch is in the LOCK position.
  3. Remove the steering wheel from the steering shaft. Refer to Steering Wheel Replacement in Steering Wheel and Column.
    Fig 1: Steering Wheel, Shaft & Nut
    GM294367Courtesy of GENERAL MOTORS CORP.
    4. Fig 2: Removing/Installing Tilt Lever
    GM82174Courtesy of GENERAL MOTORS CORP.
  4. On vehicles with a tilt column, pull the tilt lever straight out from the steering column.
    5. Fig 3: Removing/Installing Lower Trim Cover
    GM283270Courtesy of GENERAL MOTORS CORP.
  5. Remove 2 TORX® head screws (1) from the lower trim cover (2).
  6. Remove the lower trim cover (2).
    7. Fig 4: Removing/Installing Upper Trim Cover
    GM283271Courtesy of GENERAL MOTORS CORP.
  7. Remove 2 TORX® head screws (2) from the upper trim cover (1).
  8. Remove the upper trim cover (1).
    9. Fig 5: Steering Column Retaining Ring
    GM1561386Courtesy of GENERAL MOTORS CORP.
  9. Remove the wire harness straps from the steering wheel column wire harness.
  10. Remove the retaining ring.
    11. Fig 6: SIR Wiring Harness (Steering Column)
    GM1561385Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the wire harness assembly from the base of the column.
  12. Remove the SIR coil and wire harness assembly from the steering shaft.
  13. If replacing, discard the SIR coil.
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