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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - 8L90 (M5U MQD) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0815, P0816, or P0826 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Test for 6, 000 to 6, 200 ohms between the test points: Signal terminal 3 & Ground terminal 4
    • If not between 6, 000 and 6, 200 ohms 

      Replace the component: S2 Transmission Manual Shift Switch

    • Go to next step: If between 6, 000 and 6, 200 ohms 
  2. Operate the component: S3 Transmission Shift Lever - Upshift
  3. Test for 600 to 700 ohms between the test points: Signal terminal 3 & Ground terminal 4
    • If not between 600 and 700 ohms 

      Replace the component: S2 Transmission Manual Shift Switch

    • Go to next step: If between 600 and 700 ohms 
  4. Operate the component: S3 Transmission Shift Lever - Downshift
  5. Test for 1900 to 2100 ohms between the test points: Signal terminal 3 & Ground terminal 4
    • If not between 1900 and 2100 ohms 

      Replace the component: S2 Transmission Manual Shift Switch

    • Go to next step: If between 1900 and 2100 ohms 
  6. All OK.
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