GM Service Manual Online
For 1990-2009 cars only

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

ECM Replacement

If the engine control module (ECM) is replaced, the following procedures must be performed:

  1. ECM Reprogramming--Refer to Service Programming System (SPS) .
  2. The CKP System Variation Learn--Refer to the following:
  3. •  Crankshaft Position System Variation Learn for the 2.2L engine
    •  Crankshaft Position System Variation Learn for the 3.5L engine
    •  Crankshaft Position System Variation Learn for the 3.9L engine
  4. 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 replaced.
  5. Transmission Fluid Life Remaining--When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
  6. Theft Deterrent--Refer to Programming Theft Deterrent System Components .

ECM Reprogramming

    • If the ECM 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.

       Important: After programming, perform the following to avoid future misdiagnosis:

    • Turn the ignition OFF for 30 seconds.
    • Turn the ignition ON with the engine OFF.
    • Use the scan tool in order to retrieve history DTCs from all modules.
    • Clear all history DTCs.

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, the CKP Variation Learn Procedure must be performed:

    • Engine replacement
    • Any engine repair that disturbs the CKP sensor or its relationship with the crankshaft reluctor wheel
    • CKP sensor

Refer to the following:

    •  Crankshaft Position System Variation Learn for the 2.2L engine
    •  Crankshaft Position System Variation Learn for the 3.5L engine
    •  Crankshaft Position System Variation Learn for the 3.9L engine