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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 31 (ENGINE CONTROLS - 6.6L - DIAGNOSIS (DTCs P0402-P2636)) >> DTC P2564 or P2565 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
  1. If DTC P0698 or P0699 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnostics.
  2. With the engine running, observe the turbocharger (TC) vane position sensor and the desired TC vane position. Slowly increase the engine speed to 2,500 RPM, then return the engine speed to idle. The TC Vane Position Sensor parameter should remain very near or equal to the desired TC Vane Position parameter.
    • If the parameter values do not follow each other, or stay near to or equal to the commanded position, continue with this diagnostic.
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