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Home >> Pontiac >> 2009 >> G5 Base, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4T45-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Reverse (With Electronic Range Select Mode) >> Low and Reverse Band Remains Applied >> 1-2 Shift Valve

1-2 Shift Valve

The 1-2 signal fluid pressure keeps the 1-2 shift valve in the downshifted position. Low/PRN fluid continues to feed the low band fluid circuit.