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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1373 (Automatic Transmission - 6L80/6L90 - DTC P0218 To DTC P0963) >> DTC P0815, P0816, or P0826 >> Circuit/System Testing >> P0826

Circuit/System Testing: P0826

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  1. Test the 12 volt reference circuit and the tap up and tap down switch signal circuit for a short to ground.
    • If the circuits test OK, test the 12 volt reference circuit and the tap up and tap down signal circuit for an open or short to voltage.
  2. Test the DSC shift switch for correct resistance value, 8.11-8.39 ohms.
    • If the resistance is not within specifications, replace the switch assembly.
    • If the resistance is within specifications, replace the BCM.
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