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GMC
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2018
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Acadia Denali, FWD
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Repair and Diagnosis
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External Pages
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Different car
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Section 350 (Rear Drive Axle)
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Diagnostic Information and Procedures
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DTC C12A1 or C12A9: Right/Left Rear Differential Clutch Solenoid Valve Control Circuit (G99)
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Conditions for Running the DTC
Conditions for Running the DTC
WARNING:
This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
The engine is running.
The engine speed is above 400 RPM.