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.
2003 Pontiac Sunfire StandardFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Body Control Module | Behind lower left side of dash. |
| Cruise Control Module | On rear right side of engine compartment. See Figure . |
| Electronic Brake Control Module | Next to master cylinder. |
| Fuel Tank Module | Under rear of passenger compartment, at fuel tank. |
| Ignition Control Module | On top left of engine. |
| Inflatable Restraint Sensing & Diagnostic Module | Under front passenger seat, under carpet. |
| Inflatable Restraint Side Impact Module (Left Front) | On driver seat back. |
| Inflatable Restraint Side Impact Module (Right Front) | On passenger seat back. |
| Powertrain Control Module | On right rear of engine compartment. See Figure . |
| Turn Signal/Hazard Flasher Module | On dash harness, near steering column. |
| Vehicle Communication Interface Module | Under right side of dash, right of blower motor. |
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.