From the factory that port isn't used on F-bodies.
Not sure it the vettes or impala SS may have used the sensor on the passenger side?
Quote:
Originally Posted by sweetbmxrider
They are controlled by the computer via the 2 wire coolant temp sensor in the water pump.
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Another option is that Hypertech sold a kit to bring the fans on early (185 degrees) You used a sensor in the passenger side head and it tied into the connects by the ECM, basically overriding the sensor in the water pump for the low speed fan, so 1 wire into the connector is used. Trace the wire, it probaly goes to the 12 pin connector near the ECM if that is a low temp fan switch.
Back in the early LT1 days these switches + thermostat swap was a cheap and easy mod that cost allot less then getting the ECM reprogrammed. I actually still use mine.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
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