I have a '01 chevy silverado and the speedometer, tach, gas gauge, message center, trip odometer, prnd321 lights, and factory stero quit working all at the same time. can anyone help me to figure out what is wrong with my truck. please help!!!!!!!

 

Did you check all the fuses?

 

Stepper motors dude.
See my reply to this thread.

https://www.truckforums.com/forum/general-motors-tech-37/speedometer-8834/