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Old 02-13-2018, 01:42 AM   #1
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Default Temperature Senso

I am working on my parents 99 Bravada 4.3L V6.

When driving, it would lose power and try to stall at low speed or at a stop. I noticed that the dash temp gauge would drop when this would happen (not all the time but most of the time). This led me to the temperature sensor. Now from my understanding, there is only 1 sensor for these engines on the drivers side of the engine in the block. It has 2 wires so I’m assuming one of them is for the dash and one is for the computer and the ground comes from it being in contact with the head. I ordered an AC Delco replacement and changed it out this weekend. The connector is on it and it is not loose. I say this because it no longer works at all. No fluctuations or anything. But the good news is that now it doesn’t do the drop in power. My question is, if I am right about the dash and the computer coming from different leads is it possible that the sensor is bad and is only working on 1 lead? Or could the connector be bad as well?
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Old 02-13-2018, 02:29 AM   #2
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Where on the gauge is the truck running at normally, and where does it drop to when issues develop?
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Old 02-13-2018, 02:33 AM   #3
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It never got above the middle but would drop anywhere between low to the middle when it would lose power.
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Old 02-13-2018, 07:07 PM   #4
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Just realized I answered you incorrectly. During normal operating temp the gauge would read just below the middle mark. When it would lose power, the needle would drop all the way down and back up. Sometimes it would drop all the way to the bottom and stay there but when it did that the engine would regain normal power until it started fluctuating again. After changing the sensor the engine seems to run fine but the gauge shows no movement. I shouldn’t say no movement because it looks like it moves back and forth a hair but that could just be my eyes messing with me...
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