Circuit Description
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 Chevrolet Suburban, and 2002 Chevrolet 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.
When the PCM detects a 4-3-3-4 gear ratio, then DTC P0756 sets. For California emissions vehicles and vehicles under 8600 GVW, DTC P0756 is a type "A" DTC. For all other vehicles, DTC P0756 is a type "C" DTC.