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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 >> Cruise Control Malfunction >> 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.
NOTE:

If the vehicle is equipped with RPO KSG, it also has Adaptive Cruise Control. Refer to the Object Detection or the Driver Assistance Systems subsection for wiring schematics, diagnostics, and description and operation related to Adaptive Cruise Control functions.

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the condition does not exist: Cruise Control System Status = Inhibit by ECM
    • Cruise Control System Status = Inhibit by ECM 

      If a condition exists - Repair or replace as necessary

    • Go to next step: Cruise Control System Status Inhibit by ECM 
  3. Verify the component works as specified: Cruise Control Switch Assembly
  4. Refer to: Body Control Module-Scan Tool Parameters
    • If a condition exists 

      Refer to Circuit/System Testing.

    • Go to next step: If no condition exists 
  5. Verify that no DTC listed in the DTC Descriptor Category is set.
    • If a related DTC is set 

      Refer to Circuit/System Testing.

    • Go to next step: If a related DTC is not set 
  6. All OK.
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