Programming and Relearning

Powertrain Control Module Programming and Setup

The following service procedures require either a programming or a setup event performed for a complete repair.

PCM Replacement

If the powertrain control module (PCM) is replaced, the following procedures must be performed:

1. The PCM Reprogramming-Refer to Service Programming System (SPS). Programming and Relearning
2. The CKP Variation Learn-Refer to the appropriate procedure:

* Crankshaft Position System Variation Learn for the 4.3L (LU3) engine.
* Crankshaft Position System Variation Learn for the 4.8L, 5.3L, 6.0L (LR4, LM7, LQ4, LQ9, or L59) engine.
* Crankshaft Position System Variation Learn for the 8.1L (L18) engine.

3. The Theft Deterrent Programming-Refer to Programming Theft Deterrent System Components. Programming and Relearning
4. The Fuel Composition Diagnostic-Refer to Fuel Composition Diagnosis for the 5.3L (L59).

PCM Reprogramming

* If the PCM needs to be reprogrammed, Refer to Service Programming System (SPS). Programming and Relearning
* Perform the Fuel Composition Diagnostic-Refer to Fuel Composition Diagnosis for the 5.3L (L59).
* Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was reprogrammed.
* Transmission Fluid Life Remaining-When available, use a scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was reprogrammed.

Setup for Component Replacement

The replacement of some components will require a setup procedure for complete repair.

If any of the following components are replaced, a CKP Variation Learn Procedure must be performed.

* Engine Replacement
* Any engine repair that disturbs the CKP sensor or it's relationship with the crankshaft reluctor wheel
* CKP Sensor