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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 P171D >> Circuit/System Description

Circuit/System Description

The solenoid valve directs pressurized fluid to exit the accumulator to apply the clutches for a 1st gear start, during an Auto Start event.

For an overview of the component/system, refer to Park - Engine Running (Hydraulic Circuits Without ETRS) , or Park - Engine Running (Hydraulic Circuits With ETRS) , or Park - Engine Running (Mechanical Powerflow)

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