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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1129 (THEFT DETERRENT SYSTEM)DESCRIPTION AND OPERATIONVEHICLE THEFT DETERRENT (VTD) DESCRIPTION AND OPERATIONPOWERTRAIN CONTROL MODULE (PCM)
2004 Oldsmobile Bravada AWD

Powertrain Control Module (PCM)

2004 Oldsmobile Bravada AWDSECTION Powertrain Control Module (PCM)
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) verifies that the password received from the theft deterrent control module via the class 2 serial data circuit is correct. The PCM can learn only one enable password. If the enable password is correct, the PCM enables the starter and fuel delivery systems.

The PCM disables the starter and fuel delivery systems if any of the following conditions occur:

  • The enable password is incorrect.
  • The system disable password is sent by the theft deterrent control module.
  • No passwords are received - there is no communication with the theft deterrent control module.
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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.