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Home >> GMC >> 2003 >> Envoy 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Self-Diagnostics - 4.2L >> Programming >> Powertrain Control Module >> Remote Programming
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Remote Programming

NOTE: DO NOT program a control module unless you are directed by a service procedure or you are directed by a technical service bulletin. Programming a control module at any other time will not permanently correct a customer's concern.

Remote Programming

  1. Connect Tech 2™ scan tool to vehicle and obtain the module information using the following procedures:
    NOTE: Ensure control module is installed in vehicle and battery is fully charged before programming.
    1. Ensure engine and Tech 2™ is off. Connect Tech 2™ to Data Link Connector (DLC).
    2. Turn ON the Tech 2™.
    3. Press ENTER at the title screen.
    4. Turn ignition on, with engine off.
    5. Select Service Programming System at the Main Menu.
      6. NOTE: Select Request Info Again if a Vehicle Identification Number (VIN) was previously stored in scan tool.
    6. Select Request Info.
    7. Enter vehicle description by following the on-screen instructions.
    8. Turn OFF all accessories and select CONTINUE.
      9. NOTE: Select No and write down the VIN if the VIN is incorrect.
    9. Verify that the correct VIN is entered on the Tech 2™ and select YES.
  2. Turn off the Tech 2™ scan tool.
  3. Disconnect Tech 2™ from vehicle.
  4. Turn ignition off.
  5. Transfer the data from the terminal to the Tech 2™ using the following procedure:
    1. Connect the Tech 2™ to the terminal.
      2. NOTE: The TIS supports service programming with the Tech 2™ scan tool only.
    2. Launch the TIS application at the terminal.
    3. Select the Service Programming System at the main screen.
    4. Highlight the following information on the Select Diagnostic Tool and Programming Process Screen:
      • Select Diagnostic Tool. Select Tech 2™.
      • Select Programming Process. Identify whether an existing module is being reprogrammed or a module is being replaced with a new one.
      • Select ECU Location. Select vehicle.
    5. Select NEXT.
    6. Verify the connections and select NEXT.
      7. NOTE: You may receive a message stating that the control module could be a service control module if you selected NO to the VIN being correct. Click OK.
    7. Verify the VIN and select NEXT.
    8. Select the appropriate controller for the vehicle being serviced.
      9. NOTE: When selecting the Vehicle Configuration Index (VCI) programming type, a valid VCI number for the vehicle must be entered. This number may be obtained from the Techline Customer Support.
    9. Select the type of programming to be performed from the following categories:
      • Normal. Used for updating an existing calibration or programming a new controller.
      • Vehicle Configuration Index (VCI). Used for updating an existing controller or programming a new controller for newer vehicles whose VINs are not yet in the database.
      • Reconfigure. Used to reconfigure a vehicle for changes in tire size and axle ratios.
    10. Select Next.
      11. NOTE: Refer to service bulletins before service programming is performed if the bulletins are listed along with the calibration files.
    11. Select the appropriate calibration file for the vehicle being serviced.
    12. Select NEXT.
      13. NOTE: Select Cancel if you receive a message stating that the calibration selected is already the current calibration in the control module and reprogramming with the same download is not allowed.
    13. Verify your selection on the Summary screen.
    14. Select NEXT.
  6. Perform the Crankshaft Position Variation Relearn Procedure using the Special Functions feature, if applicable.
  7. Close the application and return to the TIS application Selection screen after the download is complete.
  8. Turn OFF the Tech 2™.
  9. Disconnect Tech 2™ from the terminal.
  10. Transfer the data from the Tech 2™ to the control module using the following procedure:
    1. Connect the Tech 2™ to DLC, with engine and Tech 2™ OFF.
    2. Turn ON the Tech 2™.
    3. Press ENTER at the title screen.
    4. Turn ignition on, with engine off.
    5. Select Service Programming System.
    6. Select the Program ECU function on the Tech 2™.
    7. Verify the VIN and calibration numbers, select CONTINUE.
    8. Follow the on-screen instructions and select CONTINUE.
    9. Select continue and exit the program after the Tech 2™ displays Programming Was Successful.
  11. Turn ignition off.
  12. Turn OFF the Tech 2™.
  13. Disconnect the Tech 2™ from the vehicle.

Programming Verification

    NOTE: Some vehicles will require that Idle Learn, TP Learn, Theft Deterrent Relearn or Crankshaft Variation Learn procedures be performed after programming.
  1. Turn ignition off for 30 seconds.
    2. NOTE: Repeat the SPS procedure if vehicle does not start or starts but runs rough.
  2. Start engine.
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