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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1669 (Automatic Transmission - 2MT70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Description And Operation >> Automatic Transmission Hydraulic Diagrams >> Drive Range, Third Gear >> Variable Low and 1-2 Reverse Clutch Releases >> #4 Pressure Switch

#4 Pressure Switch

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The applied shift solenoid valve - mode B closes off the PS4 circuit exhaust, allowing fluid pressure in the circuit to build to actuator feed limit fluid pressure. PS4 fluid opens the normally closed #4 pressure switch, signaling the TCM that the transmission is in Drive Range - Third Gear.

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