Diagnostic Aids

If replacing the K47 Rear Drive Control Module, but not the assembly, the module needs to be configured with the rear differential clutch service calibration values. The rear differential clutch calibration values will need to be retrieved from the old K47 Rear Drive Control Module during Prepare the Control Module for Removal process and programmed into the new K47 Rear Drive Control Module using SPS.
Courtesy of GENERAL MOTORS COMPANY
If replacing only the K47 Rear Drive Control Module, before removal record the Module ID Information screen values then run Prepare the Control Module for Removal.
If renewing the complete Rear Differential, before installation record the left and right clutch ID values.
If replacing the rear differential clutch assembly and keeping the old K47 Rear Drive Control Module, the K47 Rear Drive Control Module will only need to be configured with the number stamped on the housing using a scan tool.
If original K47 Rear Drive Control Module is not communicating, skip the Prepare the Control Module for Removal step.