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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Engine Controls And Fuel - 6.0L (L96 LC8) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P0449, P0498, or P0499 >> Component Testing

Component Testing

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/Vehicle - Off
  2. Disconnect the electrical connector: Q13 Evaporative Emission Vent Solenoid Valve
  3. Test for 10 to 30 ohms between the test points: Control terminal 1/A & B+ terminal 2/B
    • If not between 10 and 30 ohms 

      Replace the component: Q13 Evaporative Emission Vent Solenoid Valve

    • Go to next step: If between 10 and 30 ohms 
  4. All OK.
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