Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 676 (STEERING WHEEL AND STEERING COLUMN)REPAIR INSTRUCTIONSIGNITION LOCK CYLINDER CASE 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 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Refer to SIR CAUTION .

Disable the SIR system. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM .
Remove the turn signal cancel cam. Refer to Turn Signal Cancel Cam And Steering Shaft Upper Bearing Spring Replacement .
Remove the ignition lock cylinder. Refer to Ignition Lock Cylinder Replacement .
Slide the PASSKEY® III (2) off of the ignition lock cylinder case (1).

Fig 1: Ignition Lock Cylinder Case
Courtesy of GENERAL MOTORS CORP.
Remove the connector (2) from the theft deterrent control module (3).
Remove the TORX® head screw (1) from the theft deterrent control module (3).

Fig 2: Removing Connector From Theft Deterrent Control Module
Courtesy of GENERAL MOTORS CORP.
Remove the theft deterrent control module (2) from the ignition lock cylinder case (1).

Fig 3: Removing Theft Deterrent Control Module From Ignition Lock Cylinder Case
Courtesy of GENERAL MOTORS CORP.
Remove the key alarm connector (1) from the ignition lock cylinder case (2).
1. 8.1. Rotate the key alarm connector (1) 90 degrees.
2. 8.2. Pull the key alarm connector (1) out of the ignition lock cylinder case (2).
  
  Fig 4: Removing Key Alarm Connector From Ignition Lock Cylinder Case
  Courtesy of GENERAL MOTORS CORP.
Remove the 2 tapping screws (2) from the ignition switch assembly (1).
Let the ignition switch assembly (1) hang freely.

Fig 5: Removing Tapping Screws From Ignition Switch Assembly
Courtesy of GENERAL MOTORS CORP.

Important: The lock bolt assembly (4) is under slight spring tension from the lock bolt spring (3). Hold the lock bolt (4) in place while removing the ignition lock cylinder case (2).
Remove the 3 pan head tapping screws (1) from the ignition lock cylinder case (2).
Remove the ignition lock cylinder case (2) from the steering column tilt head assembly (5).
Remove the lock bolt assembly (4) from the steering column tilt head assembly (5).
Remove the lock bolt spring (3) from the lock bolt assembly (4).

Fig 6: Ignition Lock Cylinder Case, Column Tilt Head Assembly, Lock Bolt & Spring
Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

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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.