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engineboy 03-12-2006, 11:10 PM I have a cold start issue, and I noticed the plug on this sensor all corroded. I cleaned it and it seemed to start fine. I want to buy a new sensor and I have a new plug portion of the harness, I want to replace them both. What is this sensor called? Where can I get one? Info: 1992 GMC 1 ton dually, 6.5 TD/auto Thanks in advance. EB Chicago TDP 03-12-2006, 11:22 PM Coolant Temperature Sensor engineboy 03-12-2006, 11:34 PM I tried that at the local parts house, all they could come up with under that description was the sending unit for the gauge that is located at the front of the drivers side head. :( Texas Diesel Guy 03-12-2006, 11:34 PM That is actually a switch, and it operates your Cold Advance/Fast Idle solenoids. I think that the GM dealership will be about the only place to find one, some fuel shops stock them as it is a fairly common piece to fail. http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=21&acpartnbr=10154649 engineboy 03-13-2006, 12:39 AM Perfect!:ro) I will run by the local AC delco Parts wharehouse tomorrow and check it out. If they dont have it I will swing by the dealer. Thanks again, EB neto1978 03-13-2006, 09:05 AM Where is this switch located? rex 03-13-2006, 02:37 PM when the switch went bad on my 93 i direct wired it to a toggle switch inside the cab works great sblair 03-13-2006, 02:53 PM Nice to know that on the 6.5TDs they actually put this switch in an accessible location. On the 6.2L its all the way at the back passenger side (cyl. 8) where its hard to reach. Some yahoo prior owner couldnt get the wrong storebought switch (I'm guessing a C-code switch didnt fit the J-code heads, because I bought same incorrect switch before I realized I had a J-code engine) to fit on my 6.2, so he used a pipe nipple and a reducer into the side of the head to "make it fit" :cookoo: and I cant reach back there with a wrench to get the nipple out. So now I've wired around it to a switch in the cab. :( | ||