Chevy Temp sensors are almost always located either on the thermostat housing or on the intake manifold very close to it. Follow your top radiator hose down to the thermostat housing. It will be in that vicinity. Looks like a brass fitting with a wire clip coming off of it. Kinda resembles a spark plug. May be covered by a heat shield.
SOURCE: coolant temperature sensor location for 1999 Dodge Durango
The sensor is right next to the heater hose outlet on the front passenger side of intake manifold. It is very small with an oval shaped connector going to it. I have the same engine.
SOURCE: where is the coolant temperature sensor on a 1999
Good Day
the ECT sensor is located on the cyl head near the coolant outlet, so if you are looking at the eng from the front of the car stand in the middle you will see the rad put your left hand on the rad then with your hand on the rad(left side) move your hand towards the back of the eng approx 6" the ECT will be around that area:
if you are replacing the ECT after putting the new ECT in warm the eng until the coolant fan turns on and off twice.
I hope this helps
Cheers
SOURCE: replacement of coolant temperature sensor
located under intake in water crossover pipe,you can access the sensor by removing intake chamber box,then pcv hose connected to the block,the connector is orangeish 2pin,use a 19mmdeep socket on a 3/8 ratchet to get it loose,make sure engine is cool,also make sure there is a new brass washer with your new sensor,sometimes the old washer comes off when removing the sensor,sometimes it sticks to the pipe,some coolant will escape so make sure to top it off
SOURCE: where is the coolant temperature sensor
These are located in the cylinder head in the back of the head...meaning 180 degrees from the belts and pulleys(front) or the side the transmission is on. Two sensors exist...the single wire sensor is for the dash gauge. Saturn pn# 21025106 is the one you need
SOURCE: I cant find my engine coolant temperature sensor
On or next to thermostat housing. You can go to autozone.com and register fro full free online repair manual
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