Powertrain Control Module: Removal
Ensure ignition is off. Disconnect negative battery cable. Disconnect harness connectors from PCM. Remove PCM from vehicle. On 4.3L, 5.0L, 5.7L and 7.4L, remove access cover and remove knock sensor module from PCM.
Ensure ignition is off. Disconnect negative battery cable. Disconnect harness connectors from PCM. Remove PCM from vehicle. On 4.3L, 5.0L, 5.7L and 7.4L, remove access cover and remove knock sensor module from PCM.