2019 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE

Unsuccessful Programming Recovery

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Ensure the EL-52100  is used when programming the vehicle.

In the event of an interrupted or unsuccessful programming event, perform the following steps:

  1. Verify the K56 Serial Data Gateway Module, X84 Data Link Connector, and programming tool connections are secure and the SPS software is up to date.
  2. Ignition/Vehicle OFF.
  3. Access SPS and follow the on-screen instructions for the K56 Serial Data Gateway Module.
  4. Verify the K56 Serial Data Gateway Module can be reprogrammed.
    • If the K56 Serial Data Gateway Module cannot be reprogrammed 
    1. Ignition/Vehicle OFF for greater than 1 min.
    2. Access SPS and follow the on-screen instructions for the K56 Serial Data Gateway Module.
    3. Verify the K56 Serial Data Gateway Module can be reprogrammed.
      • If the K56 Serial Data Gateway Module cannot be reprogrammed, replace the K56 Serial Data Gateway Module.
      • Go to next step: If the K56 Serial Data Gateway Module can be reprogrammed.
    4. All OK.
    • Go to next step: If the K56 Serial Data Gateway Module can be reprogrammed 
  5. All OK.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.