Water temp guage GMC Envoy

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papasmurf
Posts: 1
Joined: Sun Feb 10, 2013 10:49 am

Water temp guage GMC Envoy

Unread post by papasmurf » Sun Feb 10, 2013 11:00 am

Water temp guage is not working. Has gone beyond 260 and doesn't move when engine is off/on. What is the chance that the guage is shot or the sending unit is unplugged from the engine and if so, where is the sending unit located on the block? I understand this guage is in a cluster and would require total replacement but want to check to make sure that is has not just come loose from the block. Just submitted forgot to give you vehicle.It is 2004 envoy 4.2L.

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ProTech
Posts: 651
Joined: Wed Oct 17, 2012 10:08 am

Re: Water temp guage GMC Envoy

Unread post by ProTech » Sun Feb 10, 2013 8:28 pm

The coolant temperature sensor is located on the left side of the engine, behind and a bit under the alternator. It's easiest to replace if you remove the alternator first. The connector is actually a bit farther from the sensor, as the sensor has a harness coming off it. You can check to see if it's unplugged pretty easily. Either way, if it's not just unplugged, you're going to be looking at a sensor replacement or cluster replacement.
GM Dealer Technician For 18+ Years
In the automotive industry for 20+

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