2001 Chevrolet Cavalier LS, 2.4 TFACTORY OEM SERVICE PROCEDURE

Control Units

CONTROL UNITS LOCATION

Component Location
Alternative Fuel Engine Control Unit (AF ECU) At left front corner of engine compartment, behind headlamp.
Body Control Module (BCM) Behind left side of dash.
Cruise Control Module On right side of engine compartment.
Electronic Brake Control Module Next to master cylinder.
Fuel Tank Module Under rear of passenger compartment, at fuel tank.
Ignition Control Module (2.2L VIN 4) On top rear of engine, at ignition coil.
Ignition Control Module (2.4L VIN T) On top of engine, under cover.
Powertrain Control Module (PCM) In right front corner of engine compartment, behind fascia.
Sensing & Diagnostic Module (SDM) Below right front seat.
Factory Service Tools

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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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