GM 12375515
Water Sensor

The processing of the Fuel Tank pressure sensor requires using the fuel pressure gauge (J 34730-1A) as your primary tool. Start with negative Battery Cable removal then finish by lowering the fuel pressure level. Service of the Fuel Tank pressure sensor begins by draining fuel from the tank before vehicle separation. First disconnect the electrical connector from the Fuel Tank pressure sensor before removing the sensor off the fuel sender assembly. Install the new Fuel Tank pressure sensor by putting it on the fuel sender assembly then connect the electrical connector. Reinstall the Fuel Tank afterward adding fresh fuel into it. Attach the negative Battery Cable and replace the fuel filler cap while verifying the system for leaks by enabling the ignition twice with at least 2-second duration before waiting 10 seconds with no ignition followed by another 2-second ignition check.

You should begin the idle learn process for the Fuel Pressure Sensor/switch by turning off the ignition and reapplying power to the pcm battery while also disabling all air conditioning functions. Set the parking brake while using blocks for the drive wheels. Begin the operation by starting your automatic transmission engine only when engine coolant temperature reaches 80°c (176°F). Begin by selecting "drive" on the transmission while allowing the engine to idle for 5 minutes and ending with five minutes of engine idling in park before you cut off engine power for thirty seconds. Manual transmission requires engine operation in "neutral" mode followed by five-minute engine idling once the temperature reaches 80°c (176°F) and finally turns off the engine for a 30-second duration.