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GMC
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2024
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Terrain SLT, FWD
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures (2 Of 2)
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Diagnostic Information and Procedures
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DTC P2820 or P2821
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DTC Descriptor
DTC Descriptor
DTC P2820
Transmission Control Solenoid Valve 9 Stuck Off
DTC P2821
Transmission Control Solenoid Valve 9 Stuck On