For 1990-2009 cars

If the rear differential clutch control module (CCM) is replaced, the following procedures must be performed:

1. Rear Differential Clutch Control Module Programming--Refer to Service Programming System (SPS) .
2. Install a scan tool.
3. Turn ON the ignition, with the engine OFF.
4. Select Special Functions, Rear Drive System, CCM RDS Matching ID, follow instruction on the Tech 2. The CCM RDS Matching ID number can be found on the CCM harness connector.
5. Cycle the ignition OFF, then start the engine and allow to run for 1 minute. Verify the rear differential system is functioning properly.
6. After the calibration procedure, clear all DTC, and perform the Diagnostic System Check - Vehicle .