It should be screewed into the drivers side head, Between the first 2 spark plugs.
If it's not there then look at the other head were the plugs are.
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
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.
If it has a 4.3L engine the temp sensor is located next to the thermostat housing.
located coolant temp sensor
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.
The SENSOR is located towards the fron of the engine on top of the intake manifold. The temp SENDER is located on left side of the engine block near number 1 spark plug.
The coolant temp sensor will be located very close to the thermostst housing.
Assuming this is a 4.3L engine, the engine temp sensor is located between #1 and #3 spark plugs.
in the air pipe from the air filter box to the engine
No.
the temp sensor is located on the right side of the engine under the intake manifold on the engine block. Easiest access is from underneath. Location on engine: no special tools is need it to remove it