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Where is pcm located on 1995 Buick Riviera?

The PCM (Powertrain Control Module) on a 1995 Buick Riviera is located under the instrument panel, on the driver's side. It's often tucked up fairly high and might require some removal of trim pieces to access it. You'll likely need a shop manual or a reliable online diagram to be sure of the exact location and how to access it safely.