Transmission control module for 2001-2005 Duramax equipped trucks with the Allison transmission. All modules have been bench-tested in-house and confirmed fully functional. This item is pre-flashed and drop-in ready. 01-02 model transmissions did not have a G-solenoid, 03-05 modules with solenoid are backwards compatible. A $200 core charge has been added to the price, which will be refunded upon receiving your old unit.
