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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 734 (INSTRUMENT PANEL SYSTEM DISPLAYS, GAUGES AND CONSOLE)REPAIR INSTRUCTIONSIGNITION SWITCH LOCK CYLINDER REPLACEMENTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Ignition Switch Lock Cylinder Electrical Connector At Side Of Ignition Switch
    GM95718Courtesy of GENERAL MOTORS CORP.
  1. Apply the parking brake.
    2. CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  2. Disconnect the negative battery cable.
  3. Remove the console. Refer to Console Replacement .
  4. Remove the IP accessory trim plate. Refer to Trim Plate Replacement - Instrument Panel (I/P) Accessory .
  5. Remove the driver knee bolster trim panel. Refer to Trim Panel Replacement - Knee Bolster .
  6. Remove the ignition switch lock cylinder electrical connector from the retaining tab on the side of the ignition switch.
    7. Fig 2: Ignition Switch Lock Cylinder Electrical Connector
    GM95717Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the ignition switch lock cylinder electrical connector.
    8. Fig 3: Ignition Lock Cylinder At RH Lower Side Of Ignition Switch
    GM183232Courtesy of GENERAL MOTORS CORP.
  8. Insert the key and turn the ignition to ON.
  9. Using a flat bladed screwdriver or other suitable tool, depress and hold the ignition lock cylinder retaining tab (located on the RH lower side of the ignition switch)
    10. Fig 4: Ignition Switch Lock Cylinder Wire To Base Of Ignition Switch Bezel
    GM95684Courtesy of GENERAL MOTORS CORP.
  10. Pull to remove the ignition lock cylinder.
    11. IMPORTANT: Take note of how the ignition switch lock cylinder wire is wrapped around the base of the ignition switch bezel.
  11. Remove the ignition switch bezel.

    Carefully pull to unsnap.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.