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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P1048, P1049, or P2047-P2049 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Static Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector : Q61 Reductant Injector
  3. Test for 10 to 14 ohms between the test points : Control terminal 1 & Control terminal 2
    • If not between 10 and 14 ohms 

      Replace the component : Q61 Reductant Injector

    • Go to next step : If between 10 and 14 ohms 
  4. Test for infinite resistance between the test points : Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component : Q61 Reductant Injector

    • Go to next step : If infinite resistance 
  5. All OK.
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