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Home >> GMC >> 2024 >> Terrain SLT, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC P187E, P18AA-P18AE, P27EC, or P27F0 >> DTC Descriptor

DTC Descriptor

DTC P187E

Transmission Park Valve Stuck Off

DTC P18AA

Transmission Range Control Valve 1 Position Switch Circuit Stuck On

DTC P18AB

Transmission Range Control Valve 1 Position Switch Circuit Stuck Off

DTC P18AC

Transmission Range Control Valve 2 Position Switch Circuit Stuck On

DTC P18AD

Transmission Range Control Valve 2 Position Switch Circuit Stuck Off

DTC P18AE

Transmission Range Control Enable Valve Stuck Off

DTC P27EC

Transmission Range Control Valve 1 Position Switch Performance

DTC P27F0

Transmission Range Control Valve 2 Position Switch Performance

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