Powertrain Control Module: Removal
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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 right side of engine compartment. See Fig 1. Move the PCM retention bar and retainer away from the PCM. Remove the PCM from the PCM mounting bracket. Disconnect harness connectors from PCM. Remove PCM from vehicle.