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Home >> Chevrolet >> 2014 >> Express 1500 LS, RWD >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E (M30) - Description And Operation >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Manual Second Gear >> Third and Fourth Gears Prevented

Third and Fourth Gears Prevented

2-3 Shift Solenoid (SS) Valve 

The PCM energizes the 2-3 SS valve and the AFL fluid pressure holds the 2-3 shift valve in the downshift position. This electronically prevents operation of the third and fourth gears.