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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1371 (Automatic Transmission - 6L80/6L90 - DTC P0218 To DTC P0963) >> DTC P0815, P0816, or P0826 >> Circuit/System Testing >> P0816

Circuit/System Testing: P0816

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Select the Driver Shift Request parameter.
  2. Disconnect the DSC shift switch connector.
    • If the parameter status changes from Downshift to Invalid, replace the DSC shift switch.
    • If the parameter status does not change, replace the BCM.
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