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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Automatic Transmission Diagnosis - 4L80-E (Diesel)) >> Diagnostic Tests >> DTC P0758: 2-3 Shift Solenoid Valve Circuit - Electrical Malfunction >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 GMC Cab & Chassis Sierra and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The 2-3 shift solenoid valve controls fluid acting on the 2-3 shift valve. The 2-3 shift solenoid valve is a normally-open exhaust valve used with the 1-2 shift solenoid valve to allow four different shifting combinations. The 2-3 shift solenoid valve attaches to the control valve body within the transmission. The ignition voltage goes directly to the 2-3 shift solenoid valve. The PCM controls the 2-3 shift solenoid valve by providing a ground path through the 2-3 shift solenoid valve control circuit.

If the PCM detects a continuous open or short in the 2-3 shift solenoid valve circuit or the 2-3 shift solenoid valve, then DTC P0758 sets. DTC P0758 is a type "A" DTC.

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