2008 Chevy trailblazer n find out y my temp gauge isn't working

What is your question?

But like I said it has coolant but works part time. Like the one day I drove all the way to work n the gauge didn't work till I was at work n it worked today till I stopped at speedway then it didn't work

What makes this problem better or worse?

he did not yet say

How long has your 2008 Chevrolet Trailblazer had this problem?

he said it just started