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DTC Descriptor

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
DTC U1970

Gear Shift Control Module Message Authentication Keys Missing or Incomplete

DTC U1971

Gear Shift Control Module Security Hardware Internal Malfunction

DTC U1972

Gear Shift Control Module Unable to Authenticate Serial Data Message

For symptom byte information, refer to Symptom Byte List .

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