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 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Ignition Lock: Service and Repair
Ignition Lock Cylinder Solenoid Replacement
Removal Procedure
Caution: Refer to SIR Caution (SIR Caution) .
1. Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling (Service and Repair) .
2. Remove the steering column trim covers. Refer to Steering Column Trim Covers Replacement (Steering Column Trim Covers Replacement) .
3. Remove the ignition lock cylinder solenoid.
Installation Procedure
1. Install the ignition lock cylinder solenoid.
2. Install the steering column trim covers. Refer to Steering Column Trim Covers Replacement (Steering Column Trim Covers Replacement) .
3. Enable the SIR system. Refer to SIR Disabling and Enabling (Service and Repair) .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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