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
Powertrain Control Module: Removal
PCM is located on bracket, to left of right front strut tower. See Fig 1.
- Turn ignition switch to OFF position. Disconnect negative battery cable.
- Push down the locking tab and pull up on the release lever and disconnect the PCM harness connectors.
- Press the PCM retaining tab.
- Lift the PCM from the PCM bracket.
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.