2003 Chevrolet Malibu LSFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module Location

On Century and Grand Prix, PCM is located left side of engine compartment, inside air cleaner assembly. See Figure. On Malibu, PCM is located under Instrument Panel (I/P), next to Data Link Connector (DLC). See Figure.

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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