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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P158A >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no other DTCs set, except for DTC P158A.
    • Go to next step: If no other DTCs are set 
    3. NOTE:

    During the programming procedure, follow the Service Programming System (SPS) prompts for the correct ignition switch position.

  3. Reprogram ECU - K9 Body Control Module & K20 Engine Control Module
  4. Operate the vehicle within the Conditions for Running the DTC. - Verify the DTC does not set.
    • Go to next step: If the DTC is not set 
  5. All OK.
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