Question about 2004 Chevrolet Impala
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Posted on Jan 02, 2017
Usually found either on thermostat housing or close by on the lintake manifold. Usually can be removed with a regular wrench.
Posted on Mar 04, 2009
SOURCE: Coolant Temp Sensor
The coolant temperature sensor on the 3.4 is on the intake manifold where the thermostat housing is connected. Just follow the upper radiator hose to the engine to the thermostat housing under the throttle body. You'll see the temperature sensor with the two wires to unclip. Good luck and hope this helps. keep me posted, be glad to help.
Posted on Jun 11, 2009
A few different things have happened here, either you have a bad ground circuit, you have a brand new bum sensor, or quite possibly the pcm has an issue. If this was aftermarket sensor (Auto Zone or other), it could be faulty. Take it back and have them give you another. This way you don't spend money right off the bat. So let me understand, (1) when you turn on the A/C, fans come on, (2) you unplug the temp. sensor and the fail safe kicks in?!! Run the car until the operating temperature is obtained (220 deg fahreheit) and then turn the heater on making sure that heat is sufficient and no air bubbles are in the system. at 222 deg f, the fans should kick on. Listen for either low or high speed to engage. I am saying this to cover basic steps and work up to further diagnostics. Let me know what you have covered and I can send diagrams and further help.
Posted on Oct 24, 2010
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