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Home >> GMC >> 2021 >> Acadia AT4 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T50 (M3H), 9T60 (M3G) Or 9T65 (M3W) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P187D, P18E7, or P18E8 >> DTC Descriptor

DTC Descriptor

DTC P187D

Transmission Park Valve Stuck On

DTC P18E7

Transmission Park Valve Position Sensor 1 Performance

DTC P18E8

Transmission Park Valve Position Sensor 2 Performance

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