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Home >> Chevrolet >> 2019 >> Express 2500 Base, Van Cargo Extended, 2.8L Eng VIN 1 >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> OnStar Button LED Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Savana 3500, 2018 GMC Savana 2500, 2018 Chevrolet Express 3500, and 2018 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

If the green LED is off with the ignition ON and the LED does not function when commanded with the scan tool, contact the OnStar Center to confirm the vehicle has a current subscription.

  1. Ignition ON/vehicle in Service Mode.
  2. Verify no DTCs are set.
    • Go to next step: If no DTCs are set 
  3. Verify that the Green Indicator turns ON and OFF when commanding the Green Indicator ON and OFF with a scan tool.
    • If the Green Indicator does not turn ON and OFF 

      Refer to Circuit/System Testing - Green Indicator Test

    • Go to next step: If the Green Indicator turns ON and OFF 
  4. Verify that the Red Indicator turns ON and OFF when commanding the Red Indicator ON and OFF with a scan tool.
    • If the Red Indicator does not turn ON and OFF 

      Refer to Circuit/System Testing - Red Indicator Test

    • Go to next step: If the Red Indicator turns ON and OFF 
  5. All OK.
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