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.
2005 Buick LeSabre V6-3.8L VIN KFACTORY OEM SERVICE PROCEDURE
Ignition Control Module: Service and Repair
IGNITION CONTROL MODULE REPLACEMENT
REMOVAL PROCEDURE
1. Turn the ignition OFF.
2. Disconnect the 14-way connector from the ignition control module (ICM).
3. Disconnect the spark plug wires from the coil assemblies. Before removing the wires, note the position of the wires.
4. Remove the screws (1) that secure the coil assemblies (2) to the ICM (3).
5. Remove the coils (2) and the ICM (3) from the bracket.
INSTALLATION PROCEDURE
1. Attach the coils (2) and the ignition control module (3) to the bracket.
2. Install the screws (1) that retain the ignition coils (2) and the ICM (3) to the bracket.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the screws to 4.5 N.m (40 lb in).
3. Connect the spark plug wires.
4. Connect the 14-way connector to the module.
Tighten the screw to 2.1 N.m (19 lb in).
Factory Service Tools
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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.
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