Reprogram Control Module
WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The endgate must be completely closed and latched, if the endgate is open or ajar during programming, the power endgate system may become inoperative without any DTCs indicated
To reprogram an existing control module, perform the following procedure:
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- On the SPS Supported Controllers screen, select K194 Rear Gate Module - Programming and follow the on-screen instructions.
- At the end of programming, choose the "Clear All DTCs" function on the SPS screen.