The gauge doesn't move at all..........like it's unplugged. This one has a V6 and there are 2 sensors. One is a single wire sensor and the other is a 2 wire sensor. I've already performed tests on the wires for both sensors and in both cases, the gauge moved all the way to hot so, that SHOULD mean the wires and gauge are good. I've replaced both sensors as well but, the gauge still doesn't move. If the thermostat was the issue, I should still get at least SOME sort of needle movement, especially after half an hour of driving, right? Any ideas as to what's going on with this thing?