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Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2017 GMC Sierra 3500 HD, 2017 GMC Sierra 2500 HD, 2017 GMC Sierra 1500, 2017 Chevrolet Silverado 3500 HD, and 2017 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Ensure that the following conditions exist in order to prepare for trailer lighting control module programming or configuration:

  1. The battery is fully charged.
  2. The MDI data link connectors are secure.
  3. The scan tool is loaded with the most current software version.
  4. All disconnected modules and devices are reconnected securely.
  5. This entire procedure has been reviewed before proceeding.

The following service instructions reflect either a re-programming or configuration event performed to complete a repair procedure.

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