WTemp. Sending unit on Vortec heads?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by MaxCrack, Jun 13, 2002.

  1. MaxCrack

    MaxCrack 1/2 ton status

    Apr 10, 2001
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    Mt View, CA
    OK, finally got the heads on the block. The temperature sending unit on the old heads is way too big to put on the Vortec heads. I went to Napa and looked at the unit for a '96 1500 (cause they use the Vortec heads right?) well the new temp sensor has two wires coming out of it. Can I use this? And which wire do I connect the gauge to? I also noticed that the old one fits into a whole on the new intake manifold. Can I just use it there and save myself $25?
  2. dyeager535

    dyeager535 1 ton status Premium Member

    Dec 13, 2000
    Likes Received:
    Roy WA
    Just use an adapter fitting. I'd assume you can get one, I had to go from a large hole to a small fitting, THAT was an easy adapter to find.

    Two wire units are typically for the ECM, some also probably trigger a coolant warning light in the dash in some applications.

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