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Circuit Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

G solenoid is a normally-closed (N/C) solenoid used to modulate the transmission main pressure. Under specific conditions, low throttle setting, low engine torque, low engine speed, and low transmission output speeds, the transmission control module (TCM) commands the G solenoid on.

When G solenoid is applied, fluid is routed to the main pressure regulator valve; this in turn reduces the main pressure schedule and improves the volume of oil through the overage circuit. By modulating main pressure, cooler flow at idle can be increased allowing improved cooling and reducing transmission pump noise.

DTC P2810 is a type B DTC.

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