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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 333 (Programming And Setup) >> Repair Instructions >> P16 Instrument Cluster: Programming and Setup >> Reprogram ECU
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Reprogram ECU

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.

To program an existing ECU, perform the following procedure:

  1. Access the Service Programming System (SPS) and follow the on-screen instructions.
  2. On the SPS Supported Controllers screen, select P16 Instrument Cluster - Programming and Configuration and follow the on-screen instructions.
  3. At the end of programming, choose the "Clear All DTCs" function on the SPS screen.
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