Question about 2002 GMC Envoy
The outside temp sending unit is located just behind the grill on the left side. The grill is real easy to pop out of it's attaching grommets by pulling evenly on the top...just be careful that once you get the top free that you don't let the grill tilt too far forward or it will snap the bottom plastic tabs that are inserted into slots. Once you get the top free, tilt the grill slightly forward and lift straight up. It should lift free real easily. The temp sensor is on the right as viewed from in front of the car. The top support frame is semi-square so look under it near the radiator and you should see a small short probe sticking through the metal. It's about 1/2" diameter and sticks out only about 1/2". It's actually installed from behind the semi-square frame with a push-through-snap-in-place plastic housing with a detachable plug on the back of it. You'll have to reach behind it...where the fan is and snake your hand in there to pull it out while squeezing the plastic snap-in-place tabs from the front. The wires should be long enough to pull it out to use both hands to unplug it. Now, take it to the dealer (that's the only place it's available unless you find it online) and get a replacement. Be careful though because they'll try to sell you an assembly that comes with a bracket that you don't need. I bought the one with the bracket because there was none in stock without the bracket but the cost was only a few dollars more. Anyway, I think it was only about $25. Reinstalling it was a lot harder than getting it out because you have to twist your hand in a hard way but it just takes some patience to blindly find the hole to push it into. A flashlight might help but probably not. I read on a bulletin board somewhere that you would need to have it re-coded at the dealer but I didn't and it works fine. I think the temp read out on the mirror is a little off but it's close. I also read that the temp sensor is tied in with the A/C so it's important that it functions. All in all it was easy and no tools were needed...really. Hope this helps.
Posted on Sep 17, 2008
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Posted on Jan 02, 2017
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