New cluster did not fix the dead Gauge issues HELP

Well "you should have" added a ground pigtail while you had it out LOL

Have you tried grounding the sender wire, then turning the key on? Gauge should IMMEDIATELY head toward hot / full.

It's even possible the new board has a problem. On my old boards I had to solder jumpers across the IVR contacts to the board traces

You simply have to check it all

Cluster needs grounded

IVR must have 12V to it. Gauges have to have sender continuity or a "test" ground at the sender wire