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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1060 (Automatic Transmission - ALLISON - DTC P2671 To DTC P2771) >> DTC P2724 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Pressure control solenoid 1 (PCS1) is used to control on-coming, off-going, and holding pressure in any 1 of 5 clutches. This solenoid is referred to as a pressure proportional to current (PPC) solenoid, since the output hydraulic pressure supplied by this solenoid is proportional to the controlled current command.

The transmission control module (TCM) uses information from the turbine and output speed sensors to detect if a clutch is slipping. The clutch being controlled by PCS1 will vary depending on the shift that was being completed.

DTC P2724 is a type A DTC.

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