DTC Descriptor
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P27A7
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Transmission Control Solenoid Valve 1 Calibration Incorrect
- DTC P27A8
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Transmission Control Solenoid Valve 2 Calibration Incorrect
- DTC P27A9
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Transmission Control Solenoid Valve 3 Calibration Incorrect
- DTC P27AA
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Transmission Control Solenoid Valve 4 Calibration Incorrect
- DTC P27AB
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Transmission Control Solenoid Valve 5 Calibration Incorrect
- DTC P27AC
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Transmission Control Solenoid Valve 6 Calibration Incorrect
- DTC P27AD
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Transmission Control Solenoid Valve 7 Calibration Incorrect
- DTC P27AE
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Transmission Control Solenoid Valve 8 Calibration Incorrect