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.
2008 Pontiac Grand Prix V6-3.8LFACTORY OEM SERVICE PROCEDURE
Ignition Control Module: Service and Repair
Ignition Control Module Replacement
Removal Procedure
1. Remove the 14-way electrical connector from the ignition control module (ICM).
2. Disconnect the spark plug wires from the coil assemblies. Before removing the wires, note the position of the wires .
3. Remove the ICM nuts (2).
4. Remove the ICM (1) from the bracket.
5. Remove the ignition coil screws (1).
6. Remove the ignition coils (2) from the ICM (3).
Installation Procedure
1. Install the ignition coils (2) to the ICM (3).
Notice: Refer to Fastener Notice .
2. Install the ignition coil screws (1).
Tighten the screws to 4.5 N.m (40 lb in).
3. Install the ICM (1) to the bracket.
4. Install the ICM nuts (2).
Tighten the nuts to 10 N.m (89 lb in).
5. Connect the spark plug wires to the ignition coils.
6. Install the 14-way electrical connector to the ICM.
Tighten the screw to 2.1 N.m (19 lb in).
Factory Service Tools
Use the Manual With the Right Hardware
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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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