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Home >> GMC >> 2022 >> 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 P2820 or P2821 >> Circuit/System Description

Circuit/System Description

The solenoid valve controls the oil flow to the appropriate component:Clutch Selector Valve