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Discussion Starter · #1 ·
Hi, I'm trying to help a friend out. Where is the coolant temp sensor located on a 2003 Envoy 4.2l engine. Thanks !!!!!
 

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It's just above the thermostat housing, which is on the driver's side of the engine towards the front. Just behind the alternator, which must be removed to change the sensor.

What problem are they having? Are you sure it's the sensor and not the thermostat, which is a much more common failure.
 

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Discussion Starter · #3 ·
sensor

He said there was a code stored for it, I printed your response and showed it to him. He has a straight 5 engine not the v6 he asked if it was correct so I said I would ask. Thanks the help is appreciated, Dan
 
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