GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Express - AWD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Powertrain Control Module Programming and Setup

The following service procedures require either a programming or a setup event be 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) .
  2. The CKP Variation Learn
    3. • Refer to Crankshaft Position System Variation Learn for the 4.3L (LU3) engine.
    • Refer to Crankshaft Position System Variation Learn for the 4.8L, 5.3L, 6.0L (LR4, LM7, LQ4, LQ9, or L59) engines.
  3. The Immobilizer programming--Refer to Immobilizer System Component Programming .

PCM Reprogramming

Important: DO NOT reprogram a FlexFuel (E85) vehicle while the fuel composition learn function is active. If necessary, drive the vehicle until the scan tool indicates that the fuel composition learn parameter is inactive. Programming with the fuel composition learn active will result in fuel trim DTCs.

    • If the PCM needs to be reprogrammed, refer to Service Programming System (SPS) .
    • 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 crankshaft position (CKP) sensor or it's relationship with the crankshaft reluctor wheel
    • CKP sensor