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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 650 (Instrument Panel, Gauges & Console) >> Repair Instructions >> Ignition Switch Lock Cylinder Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Disable the SIR. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM .
  3. Apply the parking brake.
  4. Remove the IP cluster trim plate bezel. Refer to Trim Plate Bezel Replacement - IP Cluster  .
  5. Remove the radio. Refer to RADIO REPLACEMENT (W/O UM8) or RADIO REPLACEMENT (W UM8) .
  6. Remove the HVAC control module assembly. Refer to HVAC CONTROL MODULE .
  7. Insert the ignition key and turn the ignition switch to RUN, continue to step 8.

    If the keys are unavailable or the ignition lock cylinder is seized proceed with the following:

    1. 7.1. Remove the fasteners securing the ignition switch to the IP retainer.
    2. 7.2. Push and release the retaining tab at the rear of the ignition switch.
    3. 7.3. Remove the ignition switch through the radio opening in the retainer.
    4. 7.4. Protect the immediate work area with suitable material such as clean shop towels or a clean fender cover.
    5. 7.5. Locate the surface for the ignition switch lock cylinder release button (2) on the plastic ignition switch housing and center punch a location (1) on the "rib" approximately 3/8 inch rearward, toward the key entry end of the cylinder release button.
    6. 7.6. Drill a pilot hole through the plastic housing with a 1/8 inch drill bit.
    7. 7.7. Drill a larger hole at the pilot location, and slightly into the ignition switch lock cylinder surface to break the release button retaining spring using a 1/4 inch drill bit.
    8. 7.8. Use a magnet and remove the retainer tab (2).
    9. 7.9. Grasp the ignition switch lock cylinder and remove it from the switch housing.
    10. 7.10. Remove any plastic "flash" from the drilling operation, and using compressed air blow out the ignition switch assembly, proceed to step  11.
      11. Fig 1: Locating Ignition Switch Lock Cylinder Release Button Surface & Center Punch Location
      G01803056Courtesy of GENERAL MOTORS CORP.
  8. Look through the radio opening in the IP retainer and locate the release button (1) on the side of the ignition switch.
    9. Fig 2: Locating Release Button
    G01803057Courtesy of GENERAL MOTORS CORP.
  9. Depress and hold the ignition lock cylinder retaining tab, located on the right lower side of the ignition switch, using a flat-bladed tool or other suitable tool.
  10. Pull outward on the ignition cylinder (1) in order to remove the cylinder from the ignition switch.
    11. Fig 3: Removing Ignition Cylinder
    G01803058Courtesy of GENERAL MOTORS CORP.
  11. Remove the reader/exciter module from the ignition lock cylinder. Refer to THEFT DETERRENT EXCITER MODULE REPLACEMENT .
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