Fitment: The 4L80E-HD2 reprogramming set fits 1991-up GM vehicles equipped with the 4L80E and 4L85E automatic transmission
Premium Quality: The reprogramming set is manufactured with high quality materials to ensure stable performance and long life
Function: It is used to reprogram and update the software of the vehicle transmission control unit, which can optimize the shift logic, make the shift smoother and faster, improve the driving comfort and power performance
Performance Improvement Effect: The trans reprogramming set can significantly improve performance, improve shift quality, improve fuel economy