There are two sensors/sending units. One (the sending unit) is located on the driver's side of the engine block (just below the exhaust pipe). The other is located next to the thermostat housing on top of the engine.
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Engine temp sensor faulty, controller thinks engine is cold & sends to much fuel.
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
A bad engine temp sensor can do that.
That would be the engine coolant temp sensor for the dash gauge only. The sensor near the thermostat housing is the engine temp sensor for the ECM.
Where is the temp sensor on a 91 Chevy astro
The themostat is located in the top rad hose on the engine side, but I don't know about the sensor. In my 91 the coolant temp sensor is in the thermostat housing and the engine temp sensor is on the block.
If it has a 4.3L engine the temp sensor is located next to the thermostat housing.
The 1992 Chevy 3500 temperature sensor is located on the front of the engine. The temperature sensor will be in the vicinity of the thermostat housing.
The coolant temp sensor screws into the thermostat housing. This is located where the top radiator hose connects to the engine.
Engine coolant temp circuit high input. The engine coolant temp sensor make be bad.
The temp sensor for the ECM (engine control module) is next to the thermostat housing.