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The shift solenoid on a 2012 Chevrolet Impala is located inside the transmission. It is typically located near the top of the transmission, near the shift lever. In order to access the shift solenoid, you will need to lift the vehicle and remove the transmission pan. The shift solenoid is usually mounted on the side of the transmission and is connected to the transmission control module or the transmission valve body.
It is important to note that the location of the shift solenoid can vary depending on the specific model and year of your Chevrolet Impala. If you are not familiar with automotive repair and are unsure how to locate the shift solenoid, it is recommended that you seek the help of a professional mechanic.
If your talking about the shift solenoids in the transmission, they are located on the valve body and will require removal of the transmission cover. If your talking about the BTSI (brake transmission shift interlock solenoid this is located on the shifter module.
Here is what the service manual says about the EPC solenoid, the processor looks at allot of different inputs to command the solenoids, such as Throttle Position Sensor, Vehicle Speed Sensors, Transmission Range Sensor and RPM signal, The PCM controls the shift patterns for the transmission. Electronic Pressure Control (EPC) Solenoid The electronic pressure control (EPC) solenoid is located on the main control valve body and is controlled by the PCM. The EPC controls line pressure used to apply and release clutches and bands in the transmission. The 2-3 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 2-3 shift solenoid activates the 2-3 shift valve which controls the automatic shifting between second and third gear. Second gear is established when the 2-3 shift solenoid is switched on. The 2-3 shift solenoid is switched off when vehicle speed increases and requires a second to third gear upshift. The 3-4 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 3-4 shift solenoid activates the 3-4 shift valve which controls the automatic shifting between third and fourth gear. Third gear is established when the 3-4 solenoid is switched off. The 3-4 shift solenoid is switched on when vehicle speed increases and requires a third to fourth gear upshift.
SHIFT SOLENOID INSIDE TRANSMISSION ON THE VALVE BODY.YOU NEED A REPAIR MANUAL WITH SAME TRANSMISSION IN VECHICLE TO LOCATE SHIFT SOLENOID SINCE YOU HAVE OTHER SHIFT SOLENOIDS.
WELL TRANSMISSION SHIFT SOLENOIDS INSIDE TRANSMISSION ON THE VALVE BODY.YOU WILL NEED A FACTORY TRANSMISSION REPAIR MANUAL TO LOCATE SHIFT SOLENOID.THERE IS MORE THAN 1 SOLENOID IN VALVE BODY.
What was the codes exactly that Auto Zone gave you.??? it might just be a simple wire harness that may have gone loose since you did some work on the speed sensor.
Here are the trouble codes for your car.
Good Luck and get the car scanned again for a more define information.
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