Circuit/System Description

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.

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

DTC P2820, P2821 sets only when there is a hydraulic/mechanical problem.

For an overview of the component/system, refer to:

Electronic Component Description
Park - Engine Running (Hydraulic Circuits Without ETRS) , or Park - Engine Running (Hydraulic Circuits With ETRS) , or Park - Engine Running (Mechanical Powerflow)
Reverse (Hydraulic Circuits Without ETRS) , or Reverse (Hydraulic Circuits With ETRS) , or Reverse (Mechanical Powerflow)
Neutral - Engine Running (Hydraulic Circuits Without ETRS) , or Neutral - Engine Running (Hydraulic Circuits With ETRS) , or Neutral - Engine Running (Mechanical Powerflow)
Drive Range, First Gear (Hydraulic Circuits Without ETRS) , or Drive Range, First Gear (Hydraulic Circuits With ETRS) , or Drive Range, First Gear (Mechanical Powerflow)
Drive Range, Second Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Second Gear (Hydraulic Circuits With ETRS) , or Drive Range, Second Gear (Mechanical Powerflow)
Drive Range, Third Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Third Gear (Hydraulic Circuits With ETRS) , or Drive Range, Third Gear (Mechanical Powerflow)
Drive Range, Fourth Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Fourth Gear (Hydraulic Circuits With ETRS) , or Drive Range, Fourth Gear (Mechanical Powerflow)
Drive Range, Fifth Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Fifth Gear (Hydraulic Circuits With ETRS) , or Drive Range, Fifth Gear (Mechanical Powerflow)
Drive Range, Sixth Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Sixth Gear (Hydraulic Circuits With ETRS) , or Drive Range, Sixth Gear (Mechanical Powerflow)
Drive Range, Seventh Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Seventh Gear (Hydraulic Circuits With ETRS) , or Drive Range, Seventh Gear (Mechanical Powerflow)
Drive Range, Eighth Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Eighth Gear (Hydraulic Circuits With ETRS) , or Drive Range, Eighth Gear (Mechanical Powerflow)
Drive Range, Ninth Gear (Hydraulic Circuits Without ETRS) , or Drive Range, Ninth Gear (Hydraulic Circuits With ETRS) , or Drive Range, Ninth Gear (Mechanical Powerflow)