I can't provide you with an answer, but I am having the same problem. This morning all of my gauges were out on my 2006 G6. I shut my car off and turned it back on. They are working now, but I'm afraid this is a sign of things to come.
Why Does My Speedometer, Oil Gauge, Etc Not Work On Pontiac G6? It Is A 2006 And All Went Off Tonight.