Normal coolant temps for 7400 vortec

[c1500deathtrap]

The sensor sending to the gauge grounds in the block/water jacket, hence the one wire. The sensor for the pcm has two wires, one is a 5 volt signal and the other is its own dedicated ground, makes it more precise.

 

[c1500deathtrap]

Should really shrink your signature picture btw. makes these threads huge with very few posts. and my scrolling finger is tired.