Changed my water temp sending unit and still nothing on the gauge.

Oklacarcollecto said
"Just went out and grounded the sending unit and the gauge pegged."????

You mean that you grounded the wire that goes to the sending unit? If you did that then either they gave you a defective unit or one for and idiot light.

correct

Grounded the wire and the gauge pegs. It's been idling since I wrote the first post. Gauge hasn't moved.