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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Automatic Transmission Diagnosis - 4L80-E (Gasoline)) >> Diagnostic Tests >> DTC P0757: 2-3 Shift Solenoid Valve - Performance >> 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 flow acting on the 2-3 shift valves. The 2-3 shift solenoid valve is a normally-open exhaust valve used with the 1-2 shift solenoid valve to allow for 4 different shift combinations.

If the PCM detects a non 3rd gear ratio while 3rd gear is commanded, then DTC P0757 sets. For Federal emissions vehicles, DTC P0757 is a type "C" DTC. For California emissions vehicles, DTC P0757 is a type "A" DTC.

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