Tach, Speedo, Gas, Not Working!!!

'01 Silverado. Nothing in instrument panel works. Oil and Temp Gauges move up upon starting but tach, speedo, odometer, gas not working. Fuses look ok, now what?
Thanks
clinton

i dunno about chevs but i know on a ford there is a sensor on top of the rear dif... i broke one off once on a ford and same thing happened but the gas guage still worked... maybe chev hooks all that up in one wire bundle... dunno... but yeah maybe that'll help...