Check the gauges fuse ... may be a short, bad wire or a bad ground. Doesn't happen open but your cluster may be bad as well.
If all of the gauges stopped working there is probably a blown fuse in the right side of the console in the car or out under the hood in that fuse box. If all of the fuses are good then there is likely a bad gauge cluster or a wiring problem.
Is it all the gauges or some? You make have to take the instrumental cluster apart. Make sure all the hardness for the gauges are all connected.
The year, make and model would help but with some vehicles all the dash cluster gauges are protected with one fuse.
Definitely take apart the gauges, check and make sure all cables are intact.
What is the vehicle? late 90's dodge? 97 Dakota, Check fuses
there was a recall for that .call dealr to see if you qualify
You may have an electrical problem. need a professional tech to look at it. I just found out that it is a gauge cluster problem. This is not the first time I heard this as I did call the dealership and explained to the mechanic what was happening, he said and the same thing. It is not uncommon for this problem in trailblazers. If the gauges are not working, then your battery is not getting charged up.
The gauges on the dash is the instrument cluster.
Your speedometer may have failed, or the speedometer cable that connects to the transmission, or the plastic gear in the transmission may be broken.
They might be broken, check with a mechanic, its illegal to drive when they are broken.