How to release locked odometer mileage to the original gauge control module

If, after you attempt to transfer mileage to a new gauge control module, the odometer display has dashes (- - -), is garbled, or shows an incorrect value, the original gauge control module can be unlocked and restored to its original state. In this way, it can be used again for additional attempts to transfer the mileage:

1. Confirm that you have the latest HDS version of software.
2. Make sure that the HDS shows the correct VIN for the vehicle you are working on.
3. With the ignition switch is in LOCK (0), or the vehicle ignition is in the OFF mode, reconnect the original gauge control module.
4. Completely re-boot the HDS.
5. Clear any stored DTCs.
6. Navigate to BODY ELECTRIC/GAUGES/GAUGE CONTROL MODULE REPLACEMENT (ODO REWRITE, etc.).
7. Select 3. RELEASING LOCKED ODO VALUE.
8. Follow the prompts and the odometer mileage is restored.
9. Start over and make sure the screen prompts are followed.