05 sunfire gauge problems

I've got an 05 pontiac sunfire with gauge problems. first the gas gauge would give random readings, now its just dead. now the tach and speedo are giving random readings. any suggestions? even though the gas gauge is dead, the check gauges light still comes on if its low on gas.

Sounds like a bad instrument cluster.
See http://www.instrumentclusterrepair.com

See also similar threads at the bottom of yours.