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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P187D, P18E7, or P18E8 >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
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