SOURCE: Location of coolant temperature sensor
Maybe this will help . although this is from a 1997 Caddy.
Cadillac DeVille Engine Coolant Temperature (ECT) Sensor Location
SOURCE: location of the coolant temperature sensor
You will find this sensor where the fat hos comes from the radiator and conects to the engine block. It would be on the housing where the thermostat is located. If it is not there you should look for a sensor that has a wire connected to it anywhere on the engine block where a water inlet is located. I hope this helps. Don't forget to rate my answer, thanks.
SOURCE: location coolant temperature sensor 4.2 liter envoy ?
COOLANT TEMP SENSOR IS MOST LIKELY BAD. NEED TO CONNECT TO THE OBD CONNECTOR WITH A COMPUTER AND SEE WHAT TEMP THE COMPUTER IS SEEING.
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: sensor locations
air intake look at snorkel it could be part of mass air flow check intake for eng coolant
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