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Where is powertrain control module on 1997 Bonneville?

The Powertrain Control Module (PCM) on a 1997 Pontiac Bonneville is located under the instrument panel, on the driver's side. It's usually attached to the firewall. You'll likely need to remove some trim pieces to access it.

Important Note: Accessing the PCM often requires some mechanical skill and knowledge. If you're not comfortable working on your car's electrical system, it's best to take it to a qualified mechanic. Improper handling can damage the PCM or other components.

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