Powertrain Control Module - Removal

6.7L DIESEL

NOTE: To avoid possible voltage spike damage to the Powertrain Control Module (PCM), ignition key must be off, and both negative battery cables must be disconnected before unplugging PCM harness connectors.

1. Record any Diagnostic Trouble Codes (DTC's) found in the (PCM).

NOTE: For automatic transmission vehicles, disconnecting the battery before the 10 minute power down will result in the Fault Code P2509. This fault code will need to be cleared before returning to the customer. Also, same for manual transmissions but the time limit is 75 seconds.

2. Disconnect both negative battery cables.






CAUTION: If the connector latch is packed with dirt or debris, clean connector latch first with electrical contact cleaner otherwise damage to the connector housing may result when trying to open a dirty connector.

3. Disconnect the PCM harness connectors (3) and harness retainer (1) from PCM (4).





4. Remove bolts (1 and 2), and the PCM (3) from engine.