Powertrain Control Module: Removal

2004 Oldsmobile Bravada RWDSECTION Removal
WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

Ensure ignition is off. Disconnect negative battery cable. Locate PCM in left side of engine compartment, below battery. Disconnect harness connectors from PCM. See Fig 1 and Fig 2 . Release the spring latch from the PCM. Lift the PCM from the mounting tray. Remove PCM from vehicle.

Fig 1: Locating PCM & Identifying PCM Connectors
G00101471Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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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.