The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Sending unit mystery for 1972 TCS system

**VetteVet** · 06-19-2020, 09:46 AM

It makes sense that a double would work if you can figure out which terminal to use. The pre 64 years had a double coolant sensor which fed a hot light and a cold light but GM discontinued it in 65 or 66. It's not pertinent to your issue I just thought I would mention it.

With all the discarded systems out there you should be able to find some one with the sensor you need. It looks like the regular temp light sensor on the 67/ 72 years. That wouldn't work though it has a larger range.

Google search on 6489600--
https://search.yahoo.com/yhs/search?...896924%3Aup%3D

Nice truck you have there BTW.

06-19-2020, 09:46 AM	#5
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,707	Re: Sending unit mystery for 1972 TCS system - need sage advice It makes sense that a double would work if you can figure out which terminal to use. The pre 64 years had a double coolant sensor which fed a hot light and a cold light but GM discontinued it in 65 or 66. It's not pertinent to your issue I just thought I would mention it. With all the discarded systems out there you should be able to find some one with the sensor you need. It looks like the regular temp light sensor on the 67/ 72 years. That wouldn't work though it has a larger range. Google search on 6489600-- https://search.yahoo.com/yhs/search?...896924%3Aup%3D Nice truck you have there BTW. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. Last edited by VetteVet; 06-19-2020 at 09:52 AM.