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Home >> GMC >> 2022 >> Terrain AT4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 335 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2820 or P2821 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2021 GMC Terrain. However, it is still accessible from the selected car via links, so may be relevant.

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

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