Removal & Installation (Lumina)

Disconnect negative battery cable. Disconnect engine coolant reservoir purge hose. Remove engine compartment fuse block. Remove Powertrain Control Module (PCM) access cover. Disconnect electrical harness connectors from PCM. Remove PCM from engine compartment. To install, reverse removal procedure. After installation, perform computer relearn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.