K71 Transmission Control Module or Q8 Control Solenoid Valve Assembly: Programming and Setup (6L90 (MYD))
Diagnostic Instructions

Note:

  • Always verify the module has the newest software available before replacing the module.
  • Verify the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
  • Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. When required, install a battery maintainer or power supply that provides a steady and stable voltage. Do not use a battery charger, as charging voltage will often fluctuate when connected to the vehicle. This may interrupt programming. If a battery maintainer is not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply.
  • Turn Off or disable systems that may put a load on the vehicle's battery. For example, interior lights, daytime running lights, HVAC, and radio.
  • During the programming procedure, follow the Service Programming System (SPS) prompts for the correct ignition switch position.
  • Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to No.

Programming an Existing or New Control Module

To program an existing or new control module, perform the following procedure:

  1. Ignition » On / Vehicle » In Service Mode

    2. Note: If both controller options below are listed, select K20/K71 Engine and Transmission Control Modules.

  2. Access SPS and follow the on-screen instructions for the control module:
    • K20/K71 Engine and Transmission Control Modules
    • K71 Transmission Control ModuleorQ8 Control Solenoid Valve Assembly
  3. Perform the following learn procedure:Reset Transmission Adapts
Unsuccessful Programming Recovery

Note:

  • If programming is still not successful after the second programming attempt, check the following:
  • For facilities using an internet firewall, ensure firewall settings are not blocking file downloads and/or require elevated rights.
  • For United States and Canada GM dealers, the appropriate firewall settings can be found in the GM DEALER INFRASTRUCTURE & SECURITY GUIDELINES (DISG) section 2.d.vii.

  1. Verify the control module, data link connector and programming tool connections are secure and the tool software is up to date.
  2. Ignition » On / Vehicle » In Service Mode

    3. Note: If both controller options below are listed, select K20/K71 Engine and Transmission Control Modules.

  3. Access SPS and follow the on-screen instructions for the control module:
    • K20/K71 Engine and Transmission Control Modules
    • K71 Transmission Control ModuleorQ8 Control Solenoid Valve Assembly
    • If the programming is not successful
    1. Ignition/Vehicle » Off — For greater than 1 min
    2. Ignition » On / Vehicle » In Service Mode

      3. Note: If both controller options below are listed, select K20/K71 Engine and Transmission Control Modules.

    3. Access SPS and follow the on-screen instructions for the control module:
      • K20/K71 Engine and Transmission Control Modules
      • K71 Transmission Control ModuleorQ8 Control Solenoid Valve Assembly
      • If the programming is not successful » Replace the component:Q8 Control Solenoid Valve Assembly
      • If the programming is successful
    4. Perform the following learn procedure:Reset Transmission Adapts
    5. All OK.
    • If the programming is successful
  4. Perform the following learn procedure:Reset Transmission Adapts
  5. All OK.
Setup for Component Replacement

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

If any of the following components have been replaced, use a scan tool to perform the appropriate function.

  • Transmission replacement
  • Any internal transmission repair
  • Any speed sensor

Perform the following learn procedure:Reset Transmission Adapts

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

For control module replacement, programming, and setup refer to:Control Module References