Calibrate Control Module

To calibrate control module, perform the following procedure:

Install a scan tool.
Ignition ON.
Select Rear Differential Clutch Service Calibration Setup in the Rear Differential Clutch Control Module Configuration/Reset Function List.
Follow the scan tool directions to complete the calibration procedure.

NOTE:

The clutch service calibration will be a single numeric digit. It will be found etched (1) on clutch pack housing. The top of the numeric digit is towards the prop-shaft flange.

Fig 1: Etch Mark Location

Courtesy of GENERAL MOTORS COMPANY